EXT-8577 WIP Context menu items for multi-attachments.

Done:
- 1. Dropped the obsolete "MultipleAttachments" setting.
- 2. Added an "Add" item to the following attachment-related context menus:
     * My Appearance (ex-My Outfits) context menu.
     * Edit Outfit -> Add More context menu.
     * Object in-world context menu.
     * Inventory context menu.
     * Object inspector gear menu.
- 3. Modified "Attach To / Attach To HUD" to perform the "add" instead of "replace" action.

TODO:
- Ability to attach multiple objects at once from the Add More panel (bulk attach).
- Make sure there's no memleak when you click Wear/Attach in the in-world object context menu
  and the callback isn't invoked (because e.g. avatar fails to get close enough to the object).

Issues:

0. I'm not sure whether LLAgentWearables::userAttachMultipleAttachments()
   should replace attachments or add them. Assumed the former.

1. I couldn't verify that adding objects from the object inspector menu works
   because I either could wear an object or see its inspector, not both.

2. > 1. Right-click on an object in your inventory and select "Wear".
   > VERIFY: Attaches the object and replaces whatever's there; asks for
   > confirmation before replacing an existing object.
   I think this is impossible to implement because we don't know in advance
   what point the object will be attached to, so we can't display a confirmation dialog.

Reviewed by Seraph at https://codereview.productengine.com/secondlife/r/843/

--HG--
branch : product-engine

1 files changed, 1 insertions, 1 deletions

diff --git a/indra/newview/llviewerattachmenu.cpp b/indra/newview/llviewerattachmenu.cpp
index f683bd8674..5b3c4ea773 100644
--- a/indra/newview/llviewerattachmenu.cpp
+++ b/indra/newview/llviewerattachmenu.cpp
@@ -122,7 +122,7 @@ void LLViewerAttachMenu::attachObjects(const uuid_vec_t& items, const std::strin
 		LLViewerInventoryItem* item = (LLViewerInventoryItem*)gInventory.getLinkedItem(id);
 		if(item && gInventory.isObjectDescendentOf(id, gInventory.getRootFolderID()))
 		{
-			rez_attachment(item, attachmentp);
+			rez_attachment(item, attachmentp); // don't replace if called from an "Attach To..." menu
 		}
 		else if(item && item->isFinished())
 		{