24 files changed, 558 insertions, 225 deletions

diff --git a/indra/llui/llcommandmanager.cpp b/indra/llui/llcommandmanager.cpp
index 128ba609cb..0e2f3f1961 100644
--- a/indra/llui/llcommandmanager.cpp
+++ b/indra/llui/llcommandmanager.cpp
@@ -41,7 +41,7 @@
 // LLCommandId class
 //
 
-const LLCommandId LLCommandId::null = LLCommandId();
+const LLCommandId LLCommandId::null = LLCommandId("null command");
 
 //
 // LLCommand class
@@ -67,10 +67,11 @@ LLCommand::Params::Params()
 }
 
 LLCommand::LLCommand(const LLCommand::Params& p)
-	: mAvailableInToybox(p.available_in_toybox)
+	: mIdentifier(p.name)
+	, mAvailableInToybox(p.available_in_toybox)
 	, mIcon(p.icon)
-	, mIdentifier(p.name)
 	, mLabelRef(p.label_ref)
+	, mName(p.name)
 	, mTooltipRef(p.tooltip_ref)
 	, mExecuteFunction(p.execute_function)
 	, mExecuteParameters(p.execute_parameters)
@@ -134,7 +135,7 @@ void LLCommandManager::addCommand(LLCommand * command)
 	mCommandIndices[command_id.uuid()] = mCommands.size();
 	mCommands.push_back(command);
 
-	lldebugs << "Successfully added command: " << command->id().name() << llendl;
+	lldebugs << "Successfully added command: " << command->name() << llendl;
 }
 
 //static
diff --git a/indra/llui/llcommandmanager.h b/indra/llui/llcommandmanager.h
index 9b93ab735a..a7276a48aa 100644
--- a/indra/llui/llcommandmanager.h
+++ b/indra/llui/llcommandmanager.h
@@ -50,31 +50,20 @@ public:
 		{}
 	};
 
-	LLCommandId()
-		: mName("null command")
-	{
-		mUUID = LLUUID::generateNewID(mName);
-	}
-	
 	LLCommandId(const std::string& name)
-		: mName(name)
 	{
 		mUUID = LLUUID::generateNewID(name);
 	}
 
 	LLCommandId(const Params& p)
-	:	mName(p.name)
 	{
 		mUUID = LLUUID::generateNewID(p.name);
 	}
 
 	LLCommandId(const LLUUID& uuid)
-	:	mName(""),
-		mUUID(uuid)
-	{
-	}
+	:	mUUID(uuid)
+	{}
 	
-	const std::string& name() const { return mName; }
 	const LLUUID& uuid() const { return mUUID; }
 
 	bool operator!=(const LLCommandId& command) const
@@ -87,15 +76,9 @@ public:
 		return (mUUID == command.mUUID);
 	}
 
-	bool operator<(const LLCommandId& command) const
-	{
-		return (mName < command.mName);
-	}
-
 	static const LLCommandId null;
 
 private:
-	std::string mName;
 	LLUUID		mUUID;
 };
 
@@ -137,6 +120,7 @@ public:
 	const std::string& icon() const { return mIcon; }
 	const LLCommandId& id() const { return mIdentifier; }
 	const std::string& labelRef() const { return mLabelRef; }
+	const std::string& name() const { return mName; }
 	const std::string& tooltipRef() const { return mTooltipRef; }
 
 	const std::string& executeFunctionName() const { return mExecuteFunction; }
@@ -160,6 +144,7 @@ private:
 	bool        mAvailableInToybox;
 	std::string mIcon;
 	std::string mLabelRef;
+	std::string mName;
 	std::string mTooltipRef;
 
 	std::string mExecuteFunction;
diff --git a/indra/llui/lldockablefloater.cpp b/indra/llui/lldockablefloater.cpp
index ca2dc644a4..3396213f1c 100644
--- a/indra/llui/lldockablefloater.cpp
+++ b/indra/llui/lldockablefloater.cpp
@@ -82,7 +82,7 @@ BOOL LLDockableFloater::postBuild()
 		mForceDocking = true;
 	}
 
-	mDockTongue = LLUI::getUIImage("windows/Flyout_Pointer.png");
+	mDockTongue = LLUI::getUIImage("Flyout_Pointer");
 	LLFloater::setDocked(true);
 	return LLView::postBuild();
 }
@@ -162,10 +162,15 @@ void LLDockableFloater::setVisible(BOOL visible)
 
 void LLDockableFloater::setMinimized(BOOL minimize)
 {
-	if(minimize)
+	if(minimize && isDocked())
 	{
+		// minimizing a docked floater just hides it
 		setVisible(FALSE);
 	}
+	else
+	{
+		LLFloater::setMinimized(minimize);
+	}
 }
 
 LLView * LLDockableFloater::getDockWidget()
@@ -234,8 +239,21 @@ void LLDockableFloater::setDockControl(LLDockControl* dockControl)
 	setDocked(isDocked());
 }
 
-const LLUIImagePtr& LLDockableFloater::getDockTongue()
+const LLUIImagePtr& LLDockableFloater::getDockTongue(LLDockControl::DocAt dock_side)
 {
+	switch(dock_side)
+	{
+	case LLDockControl::LEFT:
+		mDockTongue = LLUI::getUIImage("Flyout_Left");
+		break;
+	case LLDockControl::RIGHT:
+		mDockTongue = LLUI::getUIImage("Flyout_Right");
+		break;
+	default:
+		mDockTongue = LLUI::getUIImage("Flyout_Pointer");
+		break;
+	}
+
 	return mDockTongue;
 }
 
diff --git a/indra/llui/lldockablefloater.h b/indra/llui/lldockablefloater.h
index 8deb6c1159..89c9852f4a 100644
--- a/indra/llui/lldockablefloater.h
+++ b/indra/llui/lldockablefloater.h
@@ -113,6 +113,8 @@ public:
 
 	bool getUniqueDocking() { return mUniqueDocking;	}
 	bool getUseTongue() { return mUseTongue; }
+
+	void setUseTongue(bool use_tongue) { mUseTongue = use_tongue;}
 private:
 	/**
 	 * Provides unique of dockable floater.
@@ -122,7 +124,7 @@ private:
 
 protected:
 	void setDockControl(LLDockControl* dockControl);
-	const LLUIImagePtr& getDockTongue();
+	const LLUIImagePtr& getDockTongue(LLDockControl::DocAt dock_side = LLDockControl::TOP);
 
 	// Checks if docking should be forced.
 	// It may be useful e.g. if floater created in mouselook mode (see EXT-5609)
diff --git a/indra/llui/lldockcontrol.cpp b/indra/llui/lldockcontrol.cpp
index 6397bbd0de..af39e41fa6 100644
--- a/indra/llui/lldockcontrol.cpp
+++ b/indra/llui/lldockcontrol.cpp
@@ -100,12 +100,16 @@ void LLDockControl::repositionDockable()
 	if (!mDockWidget) return;
 	LLRect dockRect = mDockWidget->calcScreenRect();
 	LLRect rootRect;
+	LLRect floater_rect = mDockableFloater->calcScreenRect();
 	mGetAllowedRectCallback(rootRect);
 
-	// recalculate dockable position if dock position changed, dock visibility changed,
-	// root view rect changed or recalculation is forced
-	if (mPrevDockRect != dockRect  || mDockWidgetVisible != isDockVisible()
-			|| mRootRect != rootRect || mRecalculateDocablePosition)
+	// recalculate dockable position if:
+	if (mPrevDockRect != dockRect					//dock position   changed
+		|| mDockWidgetVisible != isDockVisible()	//dock visibility changed
+		|| mRootRect != rootRect					//root view rect  changed
+		|| mFloaterRect != floater_rect				//floater rect    changed
+		|| mRecalculateDockablePosition				//recalculation is forced
+	)
 	{
 		// undock dockable and off() if dock not visible
 		if (!isDockVisible())
@@ -136,7 +140,8 @@ void LLDockControl::repositionDockable()
 
 		mPrevDockRect = dockRect;
 		mRootRect = rootRect;
-		mRecalculateDocablePosition = false;
+		mFloaterRect = floater_rect;
+		mRecalculateDockablePosition = false;
 		mDockWidgetVisible = isDockVisible();
 	}
 }
@@ -203,21 +208,33 @@ void LLDockControl::moveDockable()
 	switch (mDockAt)
 	{
 	case LEFT:
-		x = dockRect.mLeft;
-		y = dockRect.mTop + mDockTongue->getHeight() + dockableRect.getHeight();
-		// check is dockable inside root view rect
-		if (x < rootRect.mLeft)
+
+		x = dockRect.mLeft - dockableRect.getWidth();
+		y = dockRect.getCenterY() + dockableRect.getHeight() / 2;
+		
+		if (use_tongue)
 		{
-			x = rootRect.mLeft;
+			x -= mDockTongue->getWidth();
 		}
-		if (x + dockableRect.getWidth() > rootRect.mRight)
+
+		mDockTongueX = dockableRect.mRight;
+		mDockTongueY = dockableRect.getCenterY() - mDockTongue->getHeight() / 2;
+		
+		break;
+
+	case RIGHT:
+
+		x = dockRect.mRight;
+		y = dockRect.getCenterY() + dockableRect.getHeight() / 2;
+
+		if (use_tongue)
 		{
-			x = rootRect.mRight - dockableRect.getWidth();
+			x += mDockTongue->getWidth();
 		}
-		
-		mDockTongueX = x + dockableRect.getWidth()/2 - mDockTongue->getWidth() / 2;
-		
-		mDockTongueY = dockRect.mTop;
+
+		mDockTongueX = dockRect.mRight;
+		mDockTongueY = dockableRect.getCenterY() - mDockTongue->getHeight() / 2;
+
 		break;
 
 	case TOP:
@@ -315,13 +332,12 @@ void LLDockControl::moveDockable()
 		dockableRect.setLeftTopAndSize(x, y, dockableRect.getWidth(),
 				dockableRect.getHeight());
 	}
+
 	LLRect localDocableParentRect;
-	mDockableFloater->getParent()->screenRectToLocal(dockableRect,
-			&localDocableParentRect);
-	mDockableFloater->setRect(localDocableParentRect);
 
-	mDockableFloater->screenPointToLocal(mDockTongueX, mDockTongueY,
-			&mDockTongueX, &mDockTongueY);
+	mDockableFloater->getParent()->screenRectToLocal(dockableRect, &localDocableParentRect);
+	mDockableFloater->setRect(localDocableParentRect);
+	mDockableFloater->screenPointToLocal(mDockTongueX, mDockTongueY, &mDockTongueX, &mDockTongueY);
 
 }
 
@@ -330,7 +346,7 @@ void LLDockControl::on()
 	 if (isDockVisible())
 	{
 		mEnabled = true;
-		mRecalculateDocablePosition = true;
+		mRecalculateDockablePosition = true;
 	}
 }
 
@@ -341,7 +357,7 @@ void LLDockControl::off()
 
 void LLDockControl::forceRecalculatePosition()
 {
-	mRecalculateDocablePosition = true;
+	mRecalculateDockablePosition = true;
 }
 
 void LLDockControl::drawToungue()
diff --git a/indra/llui/lldockcontrol.h b/indra/llui/lldockcontrol.h
index 2e7359245f..c9602011f6 100644
--- a/indra/llui/lldockcontrol.h
+++ b/indra/llui/lldockcontrol.h
@@ -43,6 +43,7 @@ public:
 	{
 		TOP,
 		LEFT,
+		RIGHT,
 		BOTTOM
 	};
 
@@ -79,12 +80,13 @@ private:
 private:
 	get_allowed_rect_callback_t mGetAllowedRectCallback;
 	bool mEnabled;
-	bool mRecalculateDocablePosition;
+	bool mRecalculateDockablePosition;
 	bool mDockWidgetVisible;
 	DocAt mDockAt;
 	LLView* mDockWidget;
 	LLRect mPrevDockRect;
 	LLRect mRootRect;
+	LLRect mFloaterRect;
 	LLFloater* mDockableFloater;
 	LLUIImagePtr mDockTongue;
 	S32 mDockTongueX;
diff --git a/indra/llui/llfloater.cpp b/indra/llui/llfloater.cpp
index d1d840729d..432397d3e9 100644
--- a/indra/llui/llfloater.cpp
+++ b/indra/llui/llfloater.cpp
@@ -165,6 +165,7 @@ LLFloater::Params::Params()
 :	title("title"),
 	short_title("short_title"),
 	single_instance("single_instance", false),
+	reuse_instance("reuse_instance", false),
 	can_resize("can_resize", false),
 	can_minimize("can_minimize", true),
 	can_close("can_close", true),
@@ -174,6 +175,7 @@ LLFloater::Params::Params()
 	save_rect("save_rect", false),
 	save_visibility("save_visibility", false),
 	can_dock("can_dock", false),
+	show_title("show_title", true),
 	open_positioning("open_positioning", LLFloaterEnums::OPEN_POSITIONING_NONE),
 	specified_left("specified_left"),
 	specified_bottom("specified_bottom"),
@@ -238,6 +240,7 @@ LLFloater::LLFloater(const LLSD& key, const LLFloater::Params& p)
 	mTitle(p.title),
 	mShortTitle(p.short_title),
 	mSingleInstance(p.single_instance),
+	mReuseInstance(p.reuse_instance.isProvided() ? p.reuse_instance : p.single_instance), // reuse single-instance floaters by default
 	mKey(key),
 	mCanTearOff(p.can_tear_off),
 	mCanMinimize(p.can_minimize),
@@ -538,7 +541,6 @@ LLFloater::~LLFloater()
 		delete mResizeHandle[i];
 	}
 
-	storeRectControl();
 	setVisible(false); // We're not visible if we're destroyed
 	storeVisibilityControl();
 	storeDockStateControl();
@@ -683,7 +685,12 @@ void LLFloater::openFloater(const LLSD& key)
 	}
 	else
 	{
-		applyControlsAndPosition(LLFloaterReg::getLastFloaterCascading());
+		LLFloater* floater_to_stack = LLFloaterReg::getLastFloaterInGroup(mInstanceName);
+		if (!floater_to_stack)
+		{
+			floater_to_stack = LLFloaterReg::getLastFloaterCascading();
+		}
+		applyControlsAndPosition(floater_to_stack);
 		setMinimized(FALSE);
 		setVisibleAndFrontmost(mAutoFocus);
 	}
@@ -776,12 +783,19 @@ void LLFloater::closeFloater(bool app_quitting)
 			else
 			{
 				setVisible(FALSE);
+				if (!mReuseInstance)
+				{
+					destroy();
+				}
 			}
 		}
 		else
 		{
 			setVisible(FALSE); // hide before destroying (so handleVisibilityChange() gets called)
-			destroy();
+			if (!mReuseInstance)
+			{
+				destroy();
+			}
 		}
 	}
 }
@@ -861,9 +875,16 @@ bool LLFloater::applyRectControl()
 {
 	bool saved_rect = false;
 
-	// If we have a saved rect, use it
-	if (mRectControl.size() > 1)
+	LLFloater* last_in_group = LLFloaterReg::getLastFloaterInGroup(mInstanceName);
+	if (last_in_group && last_in_group != this)
 	{
+		// other floaters in our group, position ourselves relative to them and don't save the rect
+		mRectControl.clear();
+		mOpenPositioning = LLFloaterEnums::OPEN_POSITIONING_CASCADE_GROUP;
+	}
+	else if (mRectControl.size() > 1)
+	{
+		// If we have a saved rect, use it
 		const LLRect& rect = getControlGroup()->getRect(mRectControl);
 		saved_rect = rect.notEmpty();
 		if (saved_rect)
@@ -912,8 +933,9 @@ void LLFloater::applyPositioning(LLFloater* other)
 		}
 		break;
 
+	case LLFloaterEnums::OPEN_POSITIONING_CASCADE_GROUP:
 	case LLFloaterEnums::OPEN_POSITIONING_CASCADING:
-		if (other != NULL)
+		if (other != NULL && other != this)
 		{
 			stackWith(*other);
 		}
@@ -1048,9 +1070,10 @@ void LLFloater::handleReshape(const LLRect& new_rect, bool by_user)
 	const LLRect old_rect = getRect();
 	LLView::handleReshape(new_rect, by_user);
 
-	if (by_user)
+	if (by_user && !isMinimized())
 	{
 		storeRectControl();
+		mOpenPositioning = LLFloaterEnums::OPEN_POSITIONING_NONE;
 	}
 
 	// if not minimized, adjust all snapped dependents to new shape
@@ -1142,10 +1165,6 @@ void LLFloater::setMinimized(BOOL minimize)
 			mButtonsEnabled[BUTTON_RESTORE] = TRUE;
 		}
 
-		if (mDragHandle)
-		{
-			mDragHandle->setVisible(TRUE);
-		}
 		setBorderVisible(TRUE);
 
 		for(handle_set_iter_t dependent_it = mDependents.begin();
@@ -1296,19 +1315,9 @@ void LLFloater::setIsChrome(BOOL is_chrome)
 		mButtons[BUTTON_CLOSE]->setToolTip(LLStringExplicit(getButtonTooltip(Params(), BUTTON_CLOSE, is_chrome)));
 	}
 	
-	// no titles displayed on "chrome" floaters
-	if (mDragHandle)
-		mDragHandle->setTitleVisible(!is_chrome);
-	
 	LLPanel::setIsChrome(is_chrome);
 }
 
-void LLFloater::setTitleVisible(bool visible)
-{
-	if (mDragHandle)
-		mDragHandle->setTitleVisible(visible);
-}
-
 // Change the draw style to account for the foreground state.
 void LLFloater::setForeground(BOOL front)
 {
@@ -1396,7 +1405,10 @@ void LLFloater::moveResizeHandlesToFront()
 
 BOOL LLFloater::isFrontmost()
 {
-	return gFloaterView && gFloaterView->getFrontmost() == this && getVisible();
+	LLFloaterView* floater_view = getParentByType<LLFloaterView>();
+	return getVisible()
+			&& (floater_view 
+				&& floater_view->getFrontmost() == this);
 }
 
 void LLFloater::addDependentFloater(LLFloater* floaterp, BOOL reposition)
@@ -1469,6 +1481,7 @@ BOOL LLFloater::handleMouseDown(S32 x, S32 y, MASK mask)
 		if(offerClickToButton(x, y, mask, BUTTON_CLOSE)) return TRUE;
 		if(offerClickToButton(x, y, mask, BUTTON_RESTORE)) return TRUE;
 		if(offerClickToButton(x, y, mask, BUTTON_TEAR_OFF)) return TRUE;
+		if(offerClickToButton(x, y, mask, BUTTON_DOCK)) return TRUE;
 
 		// Otherwise pass to drag handle for movement
 		return mDragHandle->handleMouseDown(x, y, mask);
@@ -1574,6 +1587,13 @@ void LLFloater::setDocked(bool docked, bool pop_on_undock)
 	{
 		mDocked = docked;
 		mButtonsEnabled[BUTTON_DOCK] = !mDocked;
+
+		if (mDocked)
+		{
+			setMinimized(FALSE);
+			mOpenPositioning = LLFloaterEnums::OPEN_POSITIONING_NONE;
+		}
+
 		updateTitleButtons();
 
 		storeDockStateControl();
@@ -1812,7 +1832,7 @@ void LLFloater::draw()
 		{
 			drawChild(mButtons[i]);
 		}
-		drawChild(mDragHandle);
+		drawChild(mDragHandle, 0, 0, TRUE);
 	}
 	else
 	{
@@ -2963,6 +2983,7 @@ void LLFloater::initFromParams(const LLFloater::Params& p)
 	mHeaderHeight = p.header_height;
 	mLegacyHeaderHeight = p.legacy_header_height;
 	mSingleInstance = p.single_instance;
+	mReuseInstance = p.reuse_instance.isProvided() ? p.reuse_instance : p.single_instance;
 
 	mOpenPositioning = p.open_positioning;
 	mSpecifiedLeft = p.specified_left;
@@ -2991,6 +3012,11 @@ void LLFloater::initFromParams(const LLFloater::Params& p)
 	{
 		setCloseCallback(initCommitCallback(p.close_callback));
 	}
+
+	if (mDragHandle)
+	{
+		mDragHandle->setTitleVisible(p.show_title);
+	}
 }
 
 boost::signals2::connection LLFloater::setMinimizeCallback( const commit_signal_t::slot_type& cb ) 
@@ -3239,7 +3265,6 @@ void LLFloater::stackWith(LLFloater& other)
 
 	next_rect.setLeftTopAndSize(next_rect.mLeft, next_rect.mTop, getRect().getWidth(), getRect().getHeight());
 	
-	mRectControl.clear(); // don't save rect of stacked floaters
 	setShape(next_rect);
 }
 
diff --git a/indra/llui/llfloater.h b/indra/llui/llfloater.h
index 8beb11507e..73e9c9e831 100644
--- a/indra/llui/llfloater.h
+++ b/indra/llui/llfloater.h
@@ -66,9 +66,9 @@ namespace LLFloaterEnums
 	{
 		OPEN_POSITIONING_NONE,
 		OPEN_POSITIONING_CASCADING,
+		OPEN_POSITIONING_CASCADE_GROUP,
 		OPEN_POSITIONING_CENTERED,
 		OPEN_POSITIONING_SPECIFIED,
-
 		OPEN_POSITIONING_COUNT
 	};
 }
@@ -120,6 +120,7 @@ public:
 								short_title;
 		
 		Optional<bool>			single_instance,
+								reuse_instance,
 								can_resize,
 								can_minimize,
 								can_close,
@@ -128,7 +129,8 @@ public:
 								save_rect,
 								save_visibility,
 								save_dock_state,
-								can_dock;
+								can_dock,
+								show_title;
 		
 		Optional<LLFloaterEnums::EOpenPositioning>	open_positioning;
 		Optional<S32>								specified_left;
@@ -209,7 +211,6 @@ public:
 	std::string		getTitle() const;
 	void			setShortTitle( const std::string& short_title );
 	std::string		getShortTitle() const;
-	void			setTitleVisible(bool visible);
 	virtual void	setMinimized(BOOL b);
 	void			moveResizeHandlesToFront();
 	void			addDependentFloater(LLFloater* dependent, BOOL reposition = TRUE);
@@ -409,6 +410,7 @@ private:
 	LLUIString		mShortTitle;
 	
 	BOOL			mSingleInstance;	// TRUE if there is only ever one instance of the floater
+	bool			mReuseInstance;		// true if we want to hide the floater when we close it instead of destroying it
 	std::string		mInstanceName;		// Store the instance name so we can remove ourselves from the list
 	
 	BOOL			mCanTearOff;
diff --git a/indra/llui/llfloaterreg.cpp b/indra/llui/llfloaterreg.cpp
index 0edfc8da2d..e144b68f5e 100644
--- a/indra/llui/llfloaterreg.cpp
+++ b/indra/llui/llfloaterreg.cpp
@@ -167,6 +167,7 @@ LLFloater* LLFloaterReg::getInstance(const std::string& name, const LLSD& key)
 				res->setInstanceName(name);
 
 				LLFloater *last_floater = (list.empty() ? NULL : list.back());
+
 				res->applyControlsAndPosition(last_floater);
 
 				gFloaterView->adjustToFitScreen(res, false);
@@ -462,16 +463,16 @@ void LLFloaterReg::toggleInstanceOrBringToFront(const LLSD& sdname, const LLSD&
 	else if (instance->isMinimized())
 	{
 		instance->setMinimized(FALSE);
-		instance->setFocus(TRUE);
+		instance->setVisibleAndFrontmost();
 	}
 	else if (!instance->isShown())
 	{
 		instance->openFloater(key);
-		instance->setFocus(TRUE);
+		instance->setVisibleAndFrontmost();
 	}
-	else if (!instance->hasFocus() && !instance->getIsChrome())
+	else if (!instance->isFrontmost())
 	{
-		instance->setFocus(TRUE);
+		instance->setVisibleAndFrontmost();
 	}
 	else
 	{
diff --git a/indra/llui/llkeywords.cpp b/indra/llui/llkeywords.cpp
index ceec9c7eb1..c1cd04186b 100644
--- a/indra/llui/llkeywords.cpp
+++ b/indra/llui/llkeywords.cpp
@@ -57,6 +57,22 @@ LLKeywords::LLKeywords() : mLoaded(FALSE)
 {
 }
 
+inline BOOL LLKeywordToken::isTail(const llwchar* s) const
+{
+	BOOL res = TRUE;
+	const llwchar* t = mDelimiter.c_str();
+	S32 len = mDelimiter.size();
+	for (S32 i=0; i<len; i++)
+	{
+		if (s[i] != t[i])
+		{
+			res = FALSE;
+			break;
+		}
+	}
+	return res;
+}
+
 LLKeywords::~LLKeywords()
 {
 	std::for_each(mWordTokenMap.begin(), mWordTokenMap.end(), DeletePairedPointer());
@@ -106,6 +122,7 @@ BOOL LLKeywords::loadFromFile( const std::string& filename )
 	std::string SOL_LINE("[line ");
 	std::string SOL_ONE_SIDED_DELIMITER("[one_sided_delimiter ");
 	std::string SOL_TWO_SIDED_DELIMITER("[two_sided_delimiter ");
+	std::string SOL_DOUBLE_QUOTATION_MARKS("[double_quotation_marks ");
 
 	LLColor3 cur_color( 1, 0, 0 );
 	LLKeywordToken::TOKEN_TYPE cur_type = LLKeywordToken::WORD;
@@ -137,6 +154,12 @@ BOOL LLKeywords::loadFromFile( const std::string& filename )
 			cur_type = LLKeywordToken::TWO_SIDED_DELIMITER;
 			continue;
 		}
+		else if( line.find(SOL_DOUBLE_QUOTATION_MARKS) == 0 )
+		{
+			cur_color = readColor( line.substr(SOL_DOUBLE_QUOTATION_MARKS.size()) );
+			cur_type = LLKeywordToken::DOUBLE_QUOTATION_MARKS;
+			continue;
+		}
 		else if( line.find(SOL_ONE_SIDED_DELIMITER) == 0 )	
 		{
 			cur_color = readColor( line.substr(SOL_ONE_SIDED_DELIMITER.size()) );
@@ -154,10 +177,26 @@ BOOL LLKeywords::loadFromFile( const std::string& filename )
 
 		if( !token_buffer.empty() && token_word_iter != word_tokens.end() )
 		{
-			// first word is keyword
+			// first word is the keyword or a left delimiter
 			std::string keyword = (*token_word_iter);
 			LLStringUtil::trim(keyword);
 
+			// second word may be a right delimiter
+			std::string delimiter;
+			if (cur_type == LLKeywordToken::TWO_SIDED_DELIMITER)
+			{
+				while (delimiter.length() == 0 && ++token_word_iter != word_tokens.end())
+				{
+					delimiter = *token_word_iter;
+					LLStringUtil::trim(delimiter);
+				}
+			}
+			else if (cur_type == LLKeywordToken::DOUBLE_QUOTATION_MARKS)
+			{
+				// Closing delimiter is identical to the opening one.
+				delimiter = keyword;
+			}
+
 			// following words are tooltip
 			std::string tool_tip;
 			while (++token_word_iter != word_tokens.end())
@@ -170,11 +209,11 @@ BOOL LLKeywords::loadFromFile( const std::string& filename )
 			{
 				// Replace : with \n for multi-line tool tips.
 				LLStringUtil::replaceChar( tool_tip, ':', '\n' );
-				addToken(cur_type, keyword, cur_color, tool_tip );
+				addToken(cur_type, keyword, cur_color, tool_tip, delimiter );
 			}
 			else
 			{
-				addToken(cur_type, keyword, cur_color, LLStringUtil::null );
+				addToken(cur_type, keyword, cur_color, LLStringUtil::null, delimiter );
 			}
 		}
 	}
@@ -189,23 +228,26 @@ BOOL LLKeywords::loadFromFile( const std::string& filename )
 void LLKeywords::addToken(LLKeywordToken::TOKEN_TYPE type,
 						  const std::string& key_in,
 						  const LLColor3& color,
-						  const std::string& tool_tip_in )
+						  const std::string& tool_tip_in,
+						  const std::string& delimiter_in)
 {
 	LLWString key = utf8str_to_wstring(key_in);
 	LLWString tool_tip = utf8str_to_wstring(tool_tip_in);
+	LLWString delimiter = utf8str_to_wstring(delimiter_in);
 	switch(type)
 	{
 	case LLKeywordToken::WORD:
-		mWordTokenMap[key] = new LLKeywordToken(type, color, key, tool_tip);
+		mWordTokenMap[key] = new LLKeywordToken(type, color, key, tool_tip, LLWStringUtil::null);
 		break;
 
 	case LLKeywordToken::LINE:
-		mLineTokenList.push_front(new LLKeywordToken(type, color, key, tool_tip));
+		mLineTokenList.push_front(new LLKeywordToken(type, color, key, tool_tip, LLWStringUtil::null));
 		break;
 
 	case LLKeywordToken::TWO_SIDED_DELIMITER:
+	case LLKeywordToken::DOUBLE_QUOTATION_MARKS:
 	case LLKeywordToken::ONE_SIDED_DELIMITER:
-		mDelimiterTokenList.push_front(new LLKeywordToken(type, color, key, tool_tip));
+		mDelimiterTokenList.push_front(new LLKeywordToken(type, color, key, tool_tip, delimiter));
 		break;
 
 	default:
@@ -357,7 +399,7 @@ void LLKeywords::findSegments(std::vector<LLTextSegmentPtr>* seg_list, const LLW
 			}
 
 			// cur is now at the first non-whitespace character of a new line	
-		
+
 			// Line start tokens
 			{
 				BOOL line_done = FALSE;
@@ -418,14 +460,15 @@ void LLKeywords::findSegments(std::vector<LLTextSegmentPtr>* seg_list, const LLW
 					S32 seg_end = 0;
 
 					seg_start = cur - base;
-					cur += cur_delimiter->getLength();
+					cur += cur_delimiter->getLengthHead();
 					
-					if( cur_delimiter->getType() == LLKeywordToken::TWO_SIDED_DELIMITER )
+					LLKeywordToken::TOKEN_TYPE type = cur_delimiter->getType();
+					if( type == LLKeywordToken::TWO_SIDED_DELIMITER || type == LLKeywordToken::DOUBLE_QUOTATION_MARKS )
 					{
-						while( *cur && !cur_delimiter->isHead(cur))
+						while( *cur && !cur_delimiter->isTail(cur))
 						{
 							// Check for an escape sequence.
-							if (*cur == '\\')
+							if (type == LLKeywordToken::DOUBLE_QUOTATION_MARKS && *cur == '\\')
 							{
 								// Count the number of backslashes.
 								S32 num_backslashes = 0;
@@ -435,10 +478,10 @@ void LLKeywords::findSegments(std::vector<LLTextSegmentPtr>* seg_list, const LLW
 									between_delimiters++;
 									cur++;
 								}
-								// Is the next character the end delimiter?
-								if (cur_delimiter->isHead(cur))
+								// If the next character is the end delimiter?
+								if (cur_delimiter->isTail(cur))
 								{
-									// Is there was an odd number of backslashes, then this delimiter
+									// If there was an odd number of backslashes, then this delimiter
 									// does not end the sequence.
 									if (num_backslashes % 2 == 1)
 									{
@@ -461,13 +504,13 @@ void LLKeywords::findSegments(std::vector<LLTextSegmentPtr>* seg_list, const LLW
 
 						if( *cur )
 						{
-							cur += cur_delimiter->getLength();
-							seg_end = seg_start + between_delimiters + 2 * cur_delimiter->getLength();
+							cur += cur_delimiter->getLengthHead();
+							seg_end = seg_start + between_delimiters + cur_delimiter->getLengthHead() + cur_delimiter->getLengthTail();
 						}
 						else
 						{
 							// eof
-							seg_end = seg_start + between_delimiters + cur_delimiter->getLength();
+							seg_end = seg_start + between_delimiters + cur_delimiter->getLengthHead();
 						}
 					}
 					else
@@ -479,7 +522,7 @@ void LLKeywords::findSegments(std::vector<LLTextSegmentPtr>* seg_list, const LLW
 							between_delimiters++;
 							cur++;
 						}
-						seg_end = seg_start + between_delimiters + cur_delimiter->getLength();
+						seg_end = seg_start + between_delimiters + cur_delimiter->getLengthHead();
 					}
 
 					insertSegments(wtext, *seg_list,cur_delimiter, text_len, seg_start, seg_end, defaultColor, editor);
diff --git a/indra/llui/llkeywords.h b/indra/llui/llkeywords.h
index f6d75b7e75..ac34015393 100644
--- a/indra/llui/llkeywords.h
+++ b/indra/llui/llkeywords.h
@@ -41,23 +41,44 @@ typedef LLPointer<LLTextSegment> LLTextSegmentPtr;
 class LLKeywordToken
 {
 public:
-	enum TOKEN_TYPE { WORD, LINE, TWO_SIDED_DELIMITER, ONE_SIDED_DELIMITER };
+	/** 
+	 * @brief Types of tokens/delimters being parsed.
+	 *
+	 * @desc Tokens/delimiters that need to be identified/highlighted. All are terminated if an EOF is encountered.
+	 * - WORD are keywords in the normal sense, i.e. constants, events, etc.
+	 * - LINE are for entire lines (currently only flow control labels use this).
+	 * - ONE_SIDED_DELIMITER are for open-ended delimiters which are terminated by EOL.
+	 * - TWO_SIDED_DELIMITER are for delimiters that end with a different delimiter than they open with.
+	 * - DOUBLE_QUOTATION_MARKS are for delimiting areas using the same delimiter to open and close.
+	 */
+	enum TOKEN_TYPE
+	{
+		WORD,
+		LINE,
+		TWO_SIDED_DELIMITER,
+		ONE_SIDED_DELIMITER,
+		DOUBLE_QUOTATION_MARKS
+	};
 
-	LLKeywordToken( TOKEN_TYPE type, const LLColor3& color, const LLWString& token, const LLWString& tool_tip ) 
+	LLKeywordToken( TOKEN_TYPE type, const LLColor3& color, const LLWString& token, const LLWString& tool_tip, const LLWString& delimiter  ) 
 		:
 		mType( type ),
 		mToken( token ),
 		mColor( color ),
-		mToolTip( tool_tip )
+		mToolTip( tool_tip ),
+		mDelimiter( delimiter )		// right delimiter
 	{
 	}
 
-	S32					getLength() const		{ return mToken.size(); }
+	S32					getLengthHead() const	{ return mToken.size(); }
+	S32					getLengthTail() const	{ return mDelimiter.size(); }
 	BOOL				isHead(const llwchar* s) const;
+	BOOL				isTail(const llwchar* s) const;
 	const LLWString&	getToken() const		{ return mToken; }
 	const LLColor3&		getColor() const		{ return mColor; }
 	TOKEN_TYPE			getType()  const		{ return mType; }
 	const LLWString&	getToolTip() const		{ return mToolTip; }
+	const LLWString&	getDelimiter() const	{ return mDelimiter; }
 
 #ifdef _DEBUG
 	void		dump();
@@ -68,6 +89,7 @@ private:
 	LLWString	mToken;
 	LLColor3	mColor;
 	LLWString	mToolTip;
+	LLWString	mDelimiter;
 };
 
 class LLKeywords
@@ -85,7 +107,8 @@ public:
 	void addToken(LLKeywordToken::TOKEN_TYPE type,
 					const std::string& key,
 					const LLColor3& color,
-					const std::string& tool_tip = LLStringUtil::null);
+					const std::string& tool_tip = LLStringUtil::null,
+					const std::string& delimiter = LLStringUtil::null);
 	
 	// This class is here as a performance optimization.
 	// The word token map used to be defined as std::map<LLWString, LLKeywordToken*>.
diff --git a/indra/llui/lllayoutstack.cpp b/indra/llui/lllayoutstack.cpp
index 4991c4afa6..0e7060e22c 100644
--- a/indra/llui/lllayoutstack.cpp
+++ b/indra/llui/lllayoutstack.cpp
@@ -47,6 +47,19 @@ void LLLayoutStack::OrientationNames::declareValues()
 //
 // LLLayoutPanel
 //
+LLLayoutPanel::Params::Params()	
+:	expanded_min_dim("expanded_min_dim", 0),
+	min_dim("min_dim", 0),
+	max_dim("max_dim", S32_MAX),
+	user_resize("user_resize", true),
+	auto_resize("auto_resize", true)
+{
+	addSynonym(min_dim, "min_width");
+	addSynonym(min_dim, "min_height");
+	addSynonym(max_dim, "max_width");
+	addSynonym(max_dim, "max_height");
+}
+
 LLLayoutPanel::LLLayoutPanel(const Params& p)	
 :	LLPanel(p),
 	mExpandedMinDimSpecified(false),
@@ -527,8 +540,8 @@ void LLLayoutStack::updateLayout(BOOL force_resize)
 	// not enough room to fit existing contents
 	if (force_resize == FALSE
 		// layout did not complete by reaching target position
-		&& ((mOrientation == VERTICAL && cur_y != -mPanelSpacing)
-			|| (mOrientation == HORIZONTAL && cur_x != getRect().getWidth() + mPanelSpacing)))
+		&& ((mOrientation == VERTICAL && llround(cur_y) != -mPanelSpacing)
+			|| (mOrientation == HORIZONTAL && llround(cur_x) != getRect().getWidth() + mPanelSpacing)))
 	{
 		// do another layout pass with all stacked elements contributing
 		// even those that don't usually resize
diff --git a/indra/llui/lllayoutstack.h b/indra/llui/lllayoutstack.h
index 5d79505fc3..ede6149a80 100644
--- a/indra/llui/lllayoutstack.h
+++ b/indra/llui/lllayoutstack.h
@@ -161,18 +161,7 @@ public:
 		Optional<bool>			user_resize,
 								auto_resize;
 
-		Params()
-		:	expanded_min_dim("expanded_min_dim", 0),
-			min_dim("min_dim", 0),
-			max_dim("max_dim", 0),
-			user_resize("user_resize", true),
-			auto_resize("auto_resize", true)
-		{
-			addSynonym(min_dim, "min_width");
-			addSynonym(min_dim, "min_height");
-			addSynonym(max_dim, "max_width");
-			addSynonym(max_dim, "max_height");
-		}
+		Params();
 	};
 
 	~LLLayoutPanel();
diff --git a/indra/llui/llmenugl.cpp b/indra/llui/llmenugl.cpp
index 3ef8d8ff35..cb237fca7c 100644
--- a/indra/llui/llmenugl.cpp
+++ b/indra/llui/llmenugl.cpp
@@ -1686,7 +1686,8 @@ LLMenuGL::LLMenuGL(const LLMenuGL::Params& p)
 	mSpilloverMenu(NULL),
 	mJumpKey(p.jump_key),
 	mCreateJumpKeys(p.create_jump_keys),
-	mNeedsArrange(FALSE), 
+	mNeedsArrange(FALSE),
+	mResetScrollPositionOnShow(true),
 	mShortcutPad(p.shortcut_pad)
 {
 	typedef boost::tokenizer<boost::char_separator<char> > tokenizer;
@@ -3043,7 +3044,7 @@ void LLMenuGL::showPopup(LLView* spawning_view, LLMenuGL* menu, S32 x, S32 y)
 	S32 mouse_x, mouse_y;
 
 	// Resetting scrolling position
-	if (menu->isScrollable())
+	if (menu->isScrollable() && menu->isScrollPositionOnShowReset())
 	{
 		menu->mFirstVisibleItem = NULL;
 	}
diff --git a/indra/llui/llmenugl.h b/indra/llui/llmenugl.h
index 77db588390..bdae899933 100644
--- a/indra/llui/llmenugl.h
+++ b/indra/llui/llmenugl.h
@@ -516,6 +516,9 @@ public:
 
 	static class LLMenuHolderGL* sMenuContainer;
 	
+	void resetScrollPositionOnShow(bool reset_scroll_pos) { mResetScrollPositionOnShow = reset_scroll_pos; }
+	bool isScrollPositionOnShowReset() { return mResetScrollPositionOnShow; }
+
 protected:
 	void createSpilloverBranch();
 	void cleanupSpilloverBranch();
@@ -565,6 +568,7 @@ private:
 	KEY				mJumpKey;
 	BOOL			mCreateJumpKeys;
 	S32				mShortcutPad;
+	bool			mResetScrollPositionOnShow;
 }; // end class LLMenuGL
 
 
diff --git a/indra/llui/llsdparam.cpp b/indra/llui/llsdparam.cpp
index 6fa90933a4..0e29873bb0 100644
--- a/indra/llui/llsdparam.cpp
+++ b/indra/llui/llsdparam.cpp
@@ -36,6 +36,8 @@ static 	LLInitParam::Parser::parser_write_func_map_t sWriteFuncs;
 static 	LLInitParam::Parser::parser_inspect_func_map_t sInspectFuncs;
 static const LLSD NO_VALUE_MARKER;
 
+LLFastTimer::DeclareTimer FTM_SD_PARAM_ADAPTOR("LLSD to LLInitParam conversion");
+
 //
 // LLParamSDParser
 //
diff --git a/indra/llui/llsdparam.h b/indra/llui/llsdparam.h
index c1cfa98399..3dfc6d020e 100644
--- a/indra/llui/llsdparam.h
+++ b/indra/llui/llsdparam.h
@@ -91,6 +91,8 @@ private:
 	LLSD*					mCurWriteSD;
 };
 
+
+extern LLFastTimer::DeclareTimer FTM_SD_PARAM_ADAPTOR;
 template<typename T>
 class LLSDParamAdapter : public T
 {
@@ -98,8 +100,11 @@ public:
 	LLSDParamAdapter() {}
 	LLSDParamAdapter(const LLSD& sd)
 	{
+		LLFastTimer _(FTM_SD_PARAM_ADAPTOR);
 		LLParamSDParser parser;
-		parser.readSD(sd, *this);
+		// don't spam for implicit parsing of LLSD, as we want to allow arbitrary freeform data and ignore most of it
+		bool parse_silently = true;
+		parser.readSD(sd, *this, parse_silently);
 	}
 
 	operator LLSD() const
diff --git a/indra/llui/lltabcontainer.cpp b/indra/llui/lltabcontainer.cpp
index 9c6a76822c..ad1f3c504d 100644
--- a/indra/llui/lltabcontainer.cpp
+++ b/indra/llui/lltabcontainer.cpp
@@ -548,23 +548,23 @@ BOOL LLTabContainer::handleMouseDown( S32 x, S32 y, MASK mask )
 	}
 
 	S32 tab_count = getTabCount();
-	if (tab_count > 0)
+	if (tab_count > 0 && !getTabsHidden())
 	{
 		LLTabTuple* firsttuple = getTab(0);
 		LLRect tab_rect;
 		if (mIsVertical)
 		{
 			tab_rect = LLRect(firsttuple->mButton->getRect().mLeft,
-							  has_scroll_arrows ? mPrevArrowBtn->getRect().mBottom - tabcntrv_pad : mPrevArrowBtn->getRect().mTop,
-							  firsttuple->mButton->getRect().mRight,
-							  has_scroll_arrows ? mNextArrowBtn->getRect().mTop + tabcntrv_pad : mNextArrowBtn->getRect().mBottom );
+								has_scroll_arrows ? mPrevArrowBtn->getRect().mBottom - tabcntrv_pad : mPrevArrowBtn->getRect().mTop,
+								firsttuple->mButton->getRect().mRight,
+								has_scroll_arrows ? mNextArrowBtn->getRect().mTop + tabcntrv_pad : mNextArrowBtn->getRect().mBottom );
 		}
 		else
 		{
 			tab_rect = LLRect(has_scroll_arrows ? mPrevArrowBtn->getRect().mRight : mJumpPrevArrowBtn->getRect().mLeft,
-							  firsttuple->mButton->getRect().mTop,
-							  has_scroll_arrows ? mNextArrowBtn->getRect().mLeft : mJumpNextArrowBtn->getRect().mRight,
-							  firsttuple->mButton->getRect().mBottom );
+								firsttuple->mButton->getRect().mTop,
+								has_scroll_arrows ? mNextArrowBtn->getRect().mLeft : mJumpNextArrowBtn->getRect().mRight,
+								firsttuple->mButton->getRect().mBottom );
 		}
 		if( tab_rect.pointInRect( x, y ) )
 		{
@@ -681,7 +681,7 @@ BOOL LLTabContainer::handleToolTip( S32 x, S32 y, MASK mask)
 {
 	static LLUICachedControl<S32> tabcntrv_pad ("UITabCntrvPad", 0);
 	BOOL handled = LLPanel::handleToolTip( x, y, mask);
-	if (!handled && getTabCount() > 0) 
+	if (!handled && getTabCount() > 0 && !getTabsHidden()) 
 	{
 		LLTabTuple* firsttuple = getTab(0);
 
@@ -812,7 +812,9 @@ BOOL LLTabContainer::handleDragAndDrop(S32 x, S32 y, MASK mask,	BOOL drop,	EDrag
 {
 	BOOL has_scroll_arrows = (getMaxScrollPos() > 0);
 
-	if( mDragAndDropDelayTimer.getStarted() && mDragAndDropDelayTimer.getElapsedTimeF32() > SCROLL_DELAY_TIME )
+	if( !getTabsHidden()
+		&& mDragAndDropDelayTimer.getStarted() 
+		&& mDragAndDropDelayTimer.getElapsedTimeF32() > SCROLL_DELAY_TIME )
 	{
 		if (has_scroll_arrows)
 		{
diff --git a/indra/llui/lltoolbar.cpp b/indra/llui/lltoolbar.cpp
index 629c7d9bc7..e7642ae190 100644
--- a/indra/llui/lltoolbar.cpp
+++ b/indra/llui/lltoolbar.cpp
@@ -109,9 +109,14 @@ LLToolBar::LLToolBar(const LLToolBar::Params& p)
 	mPadBetween(p.pad_between),
 	mMinGirth(p.min_girth),
 	mPopupMenuHandle(),
+	mRightMouseTargetButton(NULL),
 	mStartDragItemCallback(NULL),
 	mHandleDragItemCallback(NULL),
 	mHandleDropCallback(NULL),
+	mButtonAddSignal(NULL),
+	mButtonEnterSignal(NULL),
+	mButtonLeaveSignal(NULL),
+	mButtonRemoveSignal(NULL),
 	mDragAndDropTarget(false)
 {
 	mButtonParams[LLToolBarEnums::BTNTYPE_ICONS_WITH_TEXT] = p.button_icon_and_text;
@@ -121,6 +126,10 @@ LLToolBar::LLToolBar(const LLToolBar::Params& p)
 LLToolBar::~LLToolBar()
 {
 	delete mPopupMenuHandle.get();
+	delete mButtonAddSignal;
+	delete mButtonEnterSignal;
+	delete mButtonLeaveSignal;
+	delete mButtonRemoveSignal;
 }
 
 void LLToolBar::createContextMenu()
@@ -131,6 +140,7 @@ void LLToolBar::createContextMenu()
 
 		LLUICtrl::CommitCallbackRegistry::ScopedRegistrar commit_reg;
 		commit_reg.add("Toolbars.EnableSetting", boost::bind(&LLToolBar::onSettingEnable, this, _2));
+		commit_reg.add("Toolbars.RemoveSelectedCommand", boost::bind(&LLToolBar::onRemoveSelectedCommand, this));
 
 		LLUICtrl::EnableCallbackRegistry::ScopedRegistrar enable_reg;
 		enable_reg.add("Toolbars.CheckSetting", boost::bind(&LLToolBar::isSettingChecked, this, _2));
@@ -212,12 +222,11 @@ bool LLToolBar::addCommand(const LLCommandId& commandId, int rank)
 	mButtonPanel->addChild(button);
 	mButtonMap.insert(std::make_pair(commandId.uuid(), button));
 
-
 	// Insert the command and button in the right place in their respective lists
 	if ((rank >= mButtonCommands.size()) || (rank == RANK_NONE))
 	{
 		// In that case, back load
-		mButtonCommands.push_back(commandId);
+		mButtonCommands.push_back(command->id());
 		mButtons.push_back(button);
 	}
 	else 
@@ -232,12 +241,20 @@ bool LLToolBar::addCommand(const LLCommandId& commandId, int rank)
 			rank--;
 		}
 		// ...then insert
-		mButtonCommands.insert(it_command,commandId);
+		mButtonCommands.insert(it_command, command->id());
 		mButtons.insert(it_button,button);
 	}
 
 	mNeedsLayout = true;
 
+	updateLayoutAsNeeded();
+
+
+	if (mButtonAddSignal)
+	{
+		(*mButtonAddSignal)(button);
+	}
+
 	return true;
 }
 
@@ -264,6 +281,11 @@ int LLToolBar::removeCommand(const LLCommandId& commandId)
 		++rank;
 	}
 	
+	if (mButtonRemoveSignal)
+	{
+		(*mButtonRemoveSignal)(*it_button);
+	}
+	
 	// Delete the button and erase the command and button records
 	delete (*it_button);
 	mButtonCommands.erase(it_command);
@@ -302,7 +324,67 @@ bool LLToolBar::enableCommand(const LLCommandId& commandId, bool enabled)
 		command_id_map::iterator it = mButtonMap.find(commandId.uuid());
 		if (it != mButtonMap.end())
 		{
-			it->second->setEnabled(enabled);
+			command_button = it->second;
+			command_button->setEnabled(enabled);
+		}
+	}
+
+	return (command_button != NULL);
+}
+
+bool LLToolBar::stopCommandInProgress(const LLCommandId& commandId)
+{
+	//
+	// Note from Leslie:
+	//
+	// This implementation was largely put in place to handle EXP-1348 which is related to
+	// dragging and dropping the "speak" button.  The "speak" button can be in one of two
+	// modes, i.e., either a toggle action or a push-to-talk action.  Because of this it
+	// responds to mouse down and mouse up in different ways, based on which behavior the
+	// button is currently set to obey.  This was the simplest way of getting the button
+	// to turn off the microphone for both behaviors without risking duplicate state.
+	//
+
+	LLToolBarButton * command_button = NULL;
+
+	if (commandId != LLCommandId::null)
+	{
+		LLCommand* command = LLCommandManager::instance().getCommand(commandId);
+		llassert(command);
+
+		// If this command has an explicit function for execution stop
+		if (command->executeStopFunctionName().length() > 0)
+		{
+			command_id_map::iterator it = mButtonMap.find(commandId.uuid());
+			if (it != mButtonMap.end())
+			{
+				command_button = it->second;
+				llassert(command_button->mIsRunningSignal);
+
+				// Check to see if it is running
+				if ((*command_button->mIsRunningSignal)(command_button, command->isRunningParameters()))
+				{
+					// Trigger an additional button commit, which calls mouse down, mouse up and commit
+					command_button->onCommit();
+				}
+			}
+		}
+	}
+
+	return (command_button != NULL);
+}
+
+bool LLToolBar::flashCommand(const LLCommandId& commandId, bool flash)
+{
+	LLButton * command_button = NULL;
+
+	if (commandId != LLCommandId::null)
+	{
+		command_id_map::iterator it = mButtonMap.find(commandId.uuid());
+		if (it != mButtonMap.end())
+		{
+			command_button = it->second;
+			command_button->setFlashing(flash ? TRUE : FALSE);
 		}
 	}
 
@@ -317,6 +399,20 @@ BOOL LLToolBar::handleRightMouseDown(S32 x, S32 y, MASK mask)
 
 	if (handle_it_here)
 	{
+		// Determine which button the mouse was over during the click in case the context menu action
+		// is intended to affect the button.
+		BOOST_FOREACH(LLToolBarButton* button, mButtons)
+		{
+			LLRect button_rect;
+			button->localRectToOtherView(button->getLocalRect(), &button_rect, this);
+
+			if (button_rect.pointInRect(x, y))
+			{
+				mRightMouseTargetButton = button;
+				break;
+			}
+		}
+
 		createContextMenu();
 
 		LLContextMenu * menu = (LLContextMenu *) mPopupMenuHandle.get();
@@ -366,6 +462,18 @@ void LLToolBar::onSettingEnable(const LLSD& userdata)
 	}
 }
 
+void LLToolBar::onRemoveSelectedCommand()
+{
+	llassert(!mReadOnly);
+
+	if (mRightMouseTargetButton)
+	{
+		removeCommand(mRightMouseTargetButton->getCommandId());
+
+		mRightMouseTargetButton = NULL;
+	}
+}
+
 void LLToolBar::setButtonType(LLToolBarEnums::ButtonType button_type)
 {
 	bool regenerate_buttons = (mButtonType != button_type);
@@ -444,11 +552,11 @@ int LLToolBar::getRankFromPosition(S32 x, S32 y)
 			S32 mid_point = (button_rect.mRight + button_rect.mLeft) / 2;
 			if (button_panel_x < mid_point)
 			{
-		mDragx = button_rect.mLeft - mPadLeft;
-		mDragy = button_rect.mTop + mPadTop;
-	}
-	else
-	{
+				mDragx = button_rect.mLeft - mPadLeft;
+				mDragy = button_rect.mTop + mPadTop;
+			}
+			else
+			{
 				rank++;
 				mDragx = button_rect.mRight + mPadRight - 1;
 				mDragy = button_rect.mTop + mPadTop;
@@ -475,12 +583,12 @@ int LLToolBar::getRankFromPosition(S32 x, S32 y)
 	{
 		// We hit passed the end of the list so put the insertion point at the end
 		if (orientation == LLLayoutStack::HORIZONTAL)
-	{
+		{
 			mDragx = button_rect.mRight + mPadRight;
 			mDragy = button_rect.mTop + mPadTop;
-	}
-	else
-	{
+		}
+		else
+		{
 			mDragx = button_rect.mLeft - mPadLeft;
 			mDragy = button_rect.mBottom - mPadBottom;
 		}
@@ -747,10 +855,16 @@ void LLToolBar::createButtons()
 {
 	BOOST_FOREACH(LLToolBarButton* button, mButtons)
 	{
+		if (mButtonRemoveSignal)
+		{
+			(*mButtonRemoveSignal)(button);
+		}
+		
 		delete button;
 	}
 	mButtons.clear();
 	mButtonMap.clear();
+	mRightMouseTargetButton = NULL;
 	
 	BOOST_FOREACH(LLCommandId& command_id, mButtonCommands)
 	{
@@ -758,6 +872,11 @@ void LLToolBar::createButtons()
 		mButtons.push_back(button);
 		mButtonPanel->addChild(button);
 		mButtonMap.insert(std::make_pair(command_id.uuid(), button));
+		
+		if (mButtonAddSignal)
+		{
+			(*mButtonAddSignal)(button);
+		}
 	}
 	mNeedsLayout = true;
 }
@@ -778,7 +897,7 @@ LLToolBarButton* LLToolBar::createButton(const LLCommandId& id)
 	if (!commandp) return NULL;
 
 	LLToolBarButton::Params button_p;
-	button_p.name = id.name();
+	button_p.name = commandp->name();
 	button_p.label = LLTrans::getString(commandp->labelRef());
 	button_p.tool_tip = LLTrans::getString(commandp->tooltipRef());
 	button_p.image_overlay = LLUI::getUIImage(commandp->icon());
@@ -827,8 +946,7 @@ LLToolBarButton* LLToolBar::createButton(const LLCommandId& id)
 			button->setCommitCallback(executeParam);
 		}
 
-
-
+		// Set up "is running" query callback
 		const std::string& isRunningFunction = commandp->isRunningFunctionName();
 		if (isRunningFunction.length() > 0)
 		{
@@ -855,6 +973,36 @@ LLToolBarButton* LLToolBar::createButton(const LLCommandId& id)
 	return button;
 }
 
+boost::signals2::connection connectSignal(LLToolBar::button_signal_t*& signal, const LLToolBar::button_signal_t::slot_type& cb)
+{
+	if (!signal)
+	{
+		signal = new LLToolBar::button_signal_t();
+	}
+
+	return signal->connect(cb);
+}
+
+boost::signals2::connection LLToolBar::setButtonAddCallback(const button_signal_t::slot_type& cb)
+{
+	return connectSignal(mButtonAddSignal, cb);
+}
+
+boost::signals2::connection LLToolBar::setButtonEnterCallback(const button_signal_t::slot_type& cb)
+{
+	return connectSignal(mButtonEnterSignal, cb);
+}
+
+boost::signals2::connection LLToolBar::setButtonLeaveCallback(const button_signal_t::slot_type& cb)
+{
+	return connectSignal(mButtonLeaveSignal, cb);
+}
+
+boost::signals2::connection LLToolBar::setButtonRemoveCallback(const button_signal_t::slot_type& cb)
+{
+	return connectSignal(mButtonRemoveSignal, cb);
+}
+
 BOOL LLToolBar::handleDragAndDrop(S32 x, S32 y, MASK mask, BOOL drop,
 										EDragAndDropType cargo_type,
 										void* cargo_data,
@@ -926,8 +1074,6 @@ LLToolBarButton::LLToolBarButton(const Params& p)
 	mOriginalImageOverlayColor(p.image_overlay_color),
 	mOriginalImageOverlaySelectedColor(p.image_overlay_selected_color)
 {
-	mButtonFlashRate = 0.0;
-	mButtonFlashCount = 0;
 }
 
 LLToolBarButton::~LLToolBarButton()
@@ -956,19 +1102,20 @@ BOOL LLToolBarButton::handleHover(S32 x, S32 y, MASK mask)
 	{
 		if (!mIsDragged)
 		{
-			mStartDragItemCallback(x,y,mId.uuid());
+			mStartDragItemCallback(x, y, this);
 			mIsDragged = true;
 			handled = TRUE;
 		}
 		else 
 		{
-			handled = mHandleDragItemCallback(x,y,mId.uuid(),LLAssetType::AT_WIDGET);
+			handled = mHandleDragItemCallback(x, y, mId.uuid(), LLAssetType::AT_WIDGET);
 		}
 	}
 	else
 	{
 		handled = LLButton::handleHover(x, y, mask);
 	}
+
 	return handled;
 }
 
@@ -981,6 +1128,23 @@ void LLToolBarButton::onMouseEnter(S32 x, S32 y, MASK mask)
 	{
 		mNeedsHighlight = TRUE;
 	}
+
+	LLToolBar* parent_toolbar = getParentByType<LLToolBar>();
+	if (parent_toolbar && parent_toolbar->mButtonEnterSignal)
+	{
+		(*(parent_toolbar->mButtonEnterSignal))(this);
+	}
+}
+
+void LLToolBarButton::onMouseLeave(S32 x, S32 y, MASK mask)
+{
+	LLButton::onMouseLeave(x, y, mask);
+	
+	LLToolBar* parent_toolbar = getParentByType<LLToolBar>();
+	if (parent_toolbar && parent_toolbar->mButtonLeaveSignal)
+	{
+		(*(parent_toolbar->mButtonLeaveSignal))(this);
+	}	
 }
 
 void LLToolBarButton::onMouseCaptureLost()
@@ -1029,25 +1193,25 @@ void LLToolBarButton::setEnabled(BOOL enabled)
 	}
 }
 
-
 const std::string LLToolBarButton::getToolTip() const	
 { 
 	std::string tooltip;
+
 	if (labelIsTruncated() || getCurrentLabel().empty())
 	{
-		return LLTrans::getString(LLCommandManager::instance().getCommand(mId)->labelRef()) + " -- " + LLView::getToolTip();
+		tooltip = LLTrans::getString(LLCommandManager::instance().getCommand(mId)->labelRef()) + " -- " + LLView::getToolTip();
 	}
 	else
 	{
-		return LLView::getToolTip();
+		tooltip = LLView::getToolTip();
 	}
-}
-
-
-
-
-
-
 
+	LLToolBar* parent_toolbar = getParentByType<LLToolBar>();
+	if (parent_toolbar && parent_toolbar->mButtonTooltipSuffix.length() > 0)
+	{
+		tooltip = tooltip + "\n(" + parent_toolbar->mButtonTooltipSuffix + ")";
+	}
 
+	return tooltip;
+}
 
diff --git a/indra/llui/lltoolbar.h b/indra/llui/lltoolbar.h
index 616710ea70..51fe23ddd1 100644
--- a/indra/llui/lltoolbar.h
+++ b/indra/llui/lltoolbar.h
@@ -36,8 +36,9 @@
 #include "llassettype.h"
 
 class LLToolBar;
+class LLToolBarButton;
 
-typedef boost::function<void (S32 x, S32 y, const LLUUID& uuid)> tool_startdrag_callback_t;
+typedef boost::function<void (S32 x, S32 y, LLToolBarButton* button)> tool_startdrag_callback_t;
 typedef boost::function<BOOL (S32 x, S32 y, const LLUUID& uuid, LLAssetType::EType type)> tool_handledrag_callback_t;
 typedef boost::function<BOOL (void* data, S32 x, S32 y, LLToolBar* toolbar)> tool_handledrop_callback_t;
 
@@ -62,14 +63,17 @@ public:
 
 	BOOL handleMouseDown(S32 x, S32 y, MASK mask);
 	BOOL handleHover(S32 x, S32 y, MASK mask);
+
 	void reshape(S32 width, S32 height, BOOL called_from_parent = true);
 	void setEnabled(BOOL enabled);
 	void setCommandId(const LLCommandId& id) { mId = id; }
+	LLCommandId getCommandId() { return mId; }
 
 	void setStartDragCallback(tool_startdrag_callback_t cb)   { mStartDragItemCallback  = cb; }
 	void setHandleDragCallback(tool_handledrag_callback_t cb) { mHandleDragItemCallback = cb; }
 
 	void onMouseEnter(S32 x, S32 y, MASK mask);
+	void onMouseLeave(S32 x, S32 y, MASK mask);
 	void onMouseCaptureLost();
 
 	void onCommit();
@@ -119,6 +123,8 @@ namespace LLToolBarEnums
 		SIDE_RIGHT,
 		SIDE_TOP,
 	};
+
+	LLLayoutStack::ELayoutOrientation getOrientation(SideType sideType);
 }
 
 // NOTE: This needs to occur before Param block declaration for proper compilation.
@@ -141,6 +147,7 @@ namespace LLInitParam
 class LLToolBar
 :	public LLUICtrl
 {
+	friend class LLToolBarButton;
 public:
 	struct Params : public LLInitParam::Block<Params, LLUICtrl::Params>
 	{
@@ -159,7 +166,8 @@ public:
 												pad_bottom,
 												pad_between,
 												min_girth;
-		// get rid of this
+
+		// default command set
 		Multiple<LLCommandId::Params>			commands;
 
 		Optional<LLPanel::Params>				button_panel;
@@ -170,8 +178,6 @@ public:
 	// virtuals
 	void draw();
 	void reshape(S32 width, S32 height, BOOL called_from_parent = TRUE);
-	int  getRankFromPosition(S32 x, S32 y);	
-	int  getRankFromPosition(const LLCommandId& id);	
 	BOOL handleRightMouseDown(S32 x, S32 y, MASK mask);
 	virtual BOOL handleDragAndDrop(S32 x, S32 y, MASK mask, BOOL drop,
 								   EDragAndDropType cargo_type,
@@ -180,79 +186,103 @@ public:
 								   std::string& tooltip_msg);
 	
 	static const int RANK_NONE = -1;
-	
 	bool addCommand(const LLCommandId& commandId, int rank = RANK_NONE);
 	int  removeCommand(const LLCommandId& commandId);		// Returns the rank the removed command was at, RANK_NONE if not found
-	bool hasCommand(const LLCommandId& commandId) const;
-	bool enableCommand(const LLCommandId& commandId, bool enabled);
+	bool hasCommand(const LLCommandId& commandId) const;	// is this command bound to a button in this toolbar
+	bool enableCommand(const LLCommandId& commandId, bool enabled);	// enable/disable button bound to the specified command, if it exists in this toolbar
+	bool stopCommandInProgress(const LLCommandId& commandId);	// stop command if it is currently active
+	bool flashCommand(const LLCommandId& commandId, bool flash); // flash button associated with given command, if in this toolbar
 
-	void setStartDragCallback(tool_startdrag_callback_t cb)   { mStartDragItemCallback  = cb; }
+	void setStartDragCallback(tool_startdrag_callback_t cb)   { mStartDragItemCallback  = cb; } // connects drag and drop behavior to external logic
 	void setHandleDragCallback(tool_handledrag_callback_t cb) { mHandleDragItemCallback = cb; }
 	void setHandleDropCallback(tool_handledrop_callback_t cb) { mHandleDropCallback     = cb; }
 	bool isReadOnly() const { return mReadOnly; }
 
 	LLToolBarButton* createButton(const LLCommandId& id);
 
+	typedef boost::signals2::signal<void (LLView* button)> button_signal_t;
+	boost::signals2::connection setButtonAddCallback(const button_signal_t::slot_type& cb);
+	boost::signals2::connection setButtonEnterCallback(const button_signal_t::slot_type& cb);
+	boost::signals2::connection setButtonLeaveCallback(const button_signal_t::slot_type& cb);
+	boost::signals2::connection setButtonRemoveCallback(const button_signal_t::slot_type& cb);
+
+	// append the specified string to end of tooltip
+	void setTooltipButtonSuffix(const std::string& suffix) { mButtonTooltipSuffix = suffix; } 
+
+	LLToolBarEnums::SideType getSideType() const { return mSideType; }
 	bool hasButtons() const { return !mButtons.empty(); }
 	bool isModified() const { return mModified; }
 
-protected:
-	friend class LLUICtrlFactory;
-	LLToolBar(const Params&);
-	~LLToolBar();
-
-	void initFromParams(const Params&);
-	tool_startdrag_callback_t		mStartDragItemCallback;
-	tool_handledrag_callback_t		mHandleDragItemCallback;
-	tool_handledrop_callback_t		mHandleDropCallback;
-	bool							mDragAndDropTarget;
-	int								mDragRank;
-	S32								mDragx,
-									mDragy,
-									mDragGirth;
+	int  getRankFromPosition(S32 x, S32 y);	
+	int  getRankFromPosition(const LLCommandId& id);	
 
-public:
 	// Methods used in loading and saving toolbar settings
 	void setButtonType(LLToolBarEnums::ButtonType button_type);
 	LLToolBarEnums::ButtonType getButtonType() { return mButtonType; }
 	command_id_list_t& getCommandsList() { return mButtonCommands; }
 	void clearCommandsList();
-					   
+
 private:
+	friend class LLUICtrlFactory;
+	LLToolBar(const Params&);
+	~LLToolBar();
+
+	void initFromParams(const Params&);
 	void createContextMenu();
 	void updateLayoutAsNeeded();
 	void createButtons();
 	void resizeButtonsInRow(std::vector<LLToolBarButton*>& buttons_in_row, S32 max_row_girth);
 	BOOL isSettingChecked(const LLSD& userdata);
 	void onSettingEnable(const LLSD& userdata);
+	void onRemoveSelectedCommand();
 
+private:
+	// static layout state
 	const bool						mReadOnly;
+	const LLToolBarEnums::SideType	mSideType;
+	const bool						mWrap;
+	const S32						mPadLeft,
+									mPadRight,
+									mPadTop,
+									mPadBottom,
+									mPadBetween,
+									mMinGirth;
+
+	// drag and drop state
+	tool_startdrag_callback_t		mStartDragItemCallback;
+	tool_handledrag_callback_t		mHandleDragItemCallback;
+	tool_handledrop_callback_t		mHandleDropCallback;
+	bool							mDragAndDropTarget;
+	int								mDragRank;
+	S32								mDragx,
+									mDragy,
+									mDragGirth;
 
 	typedef std::list<LLToolBarButton*> toolbar_button_list;
+	typedef std::map<LLUUID, LLToolBarButton*> command_id_map;
 	toolbar_button_list				mButtons;
 	command_id_list_t				mButtonCommands;
-	typedef std::map<LLUUID, LLToolBarButton*> command_id_map;
 	command_id_map					mButtonMap;
 
 	LLToolBarEnums::ButtonType		mButtonType;
+	LLToolBarButton::Params			mButtonParams[LLToolBarEnums::BTNTYPE_COUNT];
+
+	// related widgets
 	LLLayoutStack*					mCenteringStack;
-	LLLayoutStack*					mWrapStack;
 	LLPanel*						mButtonPanel;
-	LLToolBarEnums::SideType		mSideType;
-	
-	bool							mWrap;
+	LLHandle<class LLContextMenu>	mPopupMenuHandle;
+
+	LLToolBarButton*				mRightMouseTargetButton;
+
 	bool							mNeedsLayout;
 	bool							mModified;
-	S32								mPadLeft,
-									mPadRight,
-									mPadTop,
-									mPadBottom,
-									mPadBetween,
-									mMinGirth;
 
-	LLToolBarButton::Params			mButtonParams[LLToolBarEnums::BTNTYPE_COUNT];
+	button_signal_t*				mButtonAddSignal;
+	button_signal_t*				mButtonEnterSignal;
+	button_signal_t*				mButtonLeaveSignal;
+	button_signal_t*				mButtonRemoveSignal;
 
-	LLHandle<class LLContextMenu>			mPopupMenuHandle;
+	std::string						mButtonTooltipSuffix;
 };
 
 
diff --git a/indra/llui/llurlaction.cpp b/indra/llui/llurlaction.cpp
index 42b779bd28..fd9b3d9a6d 100644
--- a/indra/llui/llurlaction.cpp
+++ b/indra/llui/llurlaction.cpp
@@ -33,28 +33,28 @@
 #include "llurlregistry.h"
 
 // global state for the callback functions
-void (*LLUrlAction::sOpenURLCallback) (const std::string& url) = NULL;
-void (*LLUrlAction::sOpenURLInternalCallback) (const std::string& url) = NULL;
-void (*LLUrlAction::sOpenURLExternalCallback) (const std::string& url) = NULL;
-bool (*LLUrlAction::sExecuteSLURLCallback) (const std::string& url) = NULL;
+LLUrlAction::url_callback_t 		LLUrlAction::sOpenURLCallback;
+LLUrlAction::url_callback_t 		LLUrlAction::sOpenURLInternalCallback;
+LLUrlAction::url_callback_t 		LLUrlAction::sOpenURLExternalCallback;
+LLUrlAction::execute_url_callback_t LLUrlAction::sExecuteSLURLCallback;
 
 
-void LLUrlAction::setOpenURLCallback(void (*cb) (const std::string& url))
+void LLUrlAction::setOpenURLCallback(url_callback_t cb)
 {
 	sOpenURLCallback = cb;
 }
 
-void LLUrlAction::setOpenURLInternalCallback(void (*cb) (const std::string& url))
+void LLUrlAction::setOpenURLInternalCallback(url_callback_t cb)
 {
 	sOpenURLInternalCallback = cb;
 }
 
-void LLUrlAction::setOpenURLExternalCallback(void (*cb) (const std::string& url))
+void LLUrlAction::setOpenURLExternalCallback(url_callback_t cb)
 {
 	sOpenURLExternalCallback = cb;
 }
 
-void LLUrlAction::setExecuteSLURLCallback(bool (*cb) (const std::string& url))
+void LLUrlAction::setExecuteSLURLCallback(execute_url_callback_t cb)
 {
 	sExecuteSLURLCallback = cb;
 }
@@ -63,7 +63,7 @@ void LLUrlAction::openURL(std::string url)
 {
 	if (sOpenURLCallback)
 	{
-		(*sOpenURLCallback)(url);
+		sOpenURLCallback(url);
 	}
 }
 
@@ -71,7 +71,7 @@ void LLUrlAction::openURLInternal(std::string url)
 {
 	if (sOpenURLInternalCallback)
 	{
-		(*sOpenURLInternalCallback)(url);
+		sOpenURLInternalCallback(url);
 	}
 }
 
@@ -79,7 +79,7 @@ void LLUrlAction::openURLExternal(std::string url)
 {
 	if (sOpenURLExternalCallback)
 	{
-		(*sOpenURLExternalCallback)(url);
+		sOpenURLExternalCallback(url);
 	}
 }
 
@@ -87,18 +87,18 @@ void LLUrlAction::executeSLURL(std::string url)
 {
 	if (sExecuteSLURLCallback)
 	{
-		(*sExecuteSLURLCallback)(url);
+		sExecuteSLURLCallback(url);
 	}
 }
 
 void LLUrlAction::clickAction(std::string url)
 {
 	// Try to handle as SLURL first, then http Url
-	if ( (sExecuteSLURLCallback) && !(*sExecuteSLURLCallback)(url) )
+	if ( (sExecuteSLURLCallback) && !sExecuteSLURLCallback(url) )
 	{
 		if (sOpenURLCallback)
 		{
-			(*sOpenURLCallback)(url);
+			sOpenURLCallback(url);
 		}
 	}
 }
diff --git a/indra/llui/llurlaction.h b/indra/llui/llurlaction.h
index 0132dbaaf0..c34960b826 100644
--- a/indra/llui/llurlaction.h
+++ b/indra/llui/llurlaction.h
@@ -29,6 +29,7 @@
 #define LL_LLURLACTION_H
 
 #include <string>
+#include <boost/function.hpp>
 
 ///
 /// The LLUrlAction class provides a number of static functions that
@@ -77,17 +78,21 @@ public:
 	static void showProfile(std::string url);
 
 	/// specify the callbacks to enable this class's functionality
-	static void	setOpenURLCallback(void (*cb) (const std::string& url));
-	static void	setOpenURLInternalCallback(void (*cb) (const std::string& url));
-	static void	setOpenURLExternalCallback(void (*cb) (const std::string& url));
-	static void	setExecuteSLURLCallback(bool (*cb) (const std::string& url));
+	typedef boost::function<void (const std::string&)> url_callback_t;
+	typedef boost::function<bool(const std::string& url)> execute_url_callback_t;
+
+	static void	setOpenURLCallback(url_callback_t cb);
+	static void	setOpenURLInternalCallback(url_callback_t cb);
+	static void	setOpenURLExternalCallback(url_callback_t cb);
+	static void	setExecuteSLURLCallback(execute_url_callback_t cb);
 
 private:
 	// callbacks for operations we can perform on Urls
-	static void (*sOpenURLCallback) (const std::string& url);
-	static void (*sOpenURLInternalCallback) (const std::string& url);
-	static void (*sOpenURLExternalCallback) (const std::string& url);
-	static bool (*sExecuteSLURLCallback) (const std::string& url);
+	static url_callback_t sOpenURLCallback;
+	static url_callback_t sOpenURLInternalCallback;
+	static url_callback_t sOpenURLExternalCallback;
+
+	static execute_url_callback_t sExecuteSLURLCallback;
 };
 
 #endif
diff --git a/indra/llui/llview.cpp b/indra/llui/llview.cpp
index fdb84f1ec5..3fd7e48428 100644
--- a/indra/llui/llview.cpp
+++ b/indra/llui/llview.cpp
@@ -721,7 +721,7 @@ LLView* LLView::childrenHandleCharEvent(const std::string& desc, const METHOD& m
 
 // XDATA might be MASK, or S32 clicks
 template <typename METHOD, typename XDATA>
-LLView* LLView::childrenHandleMouseEvent(const METHOD& method, S32 x, S32 y, XDATA extra)
+LLView* LLView::childrenHandleMouseEvent(const METHOD& method, S32 x, S32 y, XDATA extra, bool allow_mouse_block)
 {
 	BOOST_FOREACH(LLView* viewp, mChildList)
 	{
@@ -734,7 +734,7 @@ LLView* LLView::childrenHandleMouseEvent(const METHOD& method, S32 x, S32 y, XDA
 		}
 
 		if ((viewp->*method)( local_x, local_y, extra )
-			|| viewp->blockMouseEvent( local_x, local_y ))
+			|| (allow_mouse_block && viewp->blockMouseEvent( local_x, local_y )))
 		{
 			viewp->logMouseEvent();
 			return viewp;
@@ -1021,7 +1021,7 @@ BOOL LLView::handleMiddleMouseUp(S32 x, S32 y, MASK mask)
 
 LLView* LLView::childrenHandleScrollWheel(S32 x, S32 y, S32 clicks)
 {
-	return childrenHandleMouseEvent(&LLView::handleScrollWheel, x, y, clicks);
+	return childrenHandleMouseEvent(&LLView::handleScrollWheel, x, y, clicks, false);
 }
 
 // Called during downward traversal
diff --git a/indra/llui/llview.h b/indra/llui/llview.h
index 6d1dda90af..08828e55e6 100644
--- a/indra/llui/llview.h
+++ b/indra/llui/llview.h
@@ -565,7 +565,7 @@ protected:
 private:
 
 	template <typename METHOD, typename XDATA>
-	LLView* childrenHandleMouseEvent(const METHOD& method, S32 x, S32 y, XDATA extra);
+	LLView* childrenHandleMouseEvent(const METHOD& method, S32 x, S32 y, XDATA extra, bool allow_mouse_block = true);
 
 	template <typename METHOD, typename CHARTYPE>
 	LLView* childrenHandleCharEvent(const std::string& desc, const METHOD& method,