EXT-7722 Fixed "Add to COF" and "Remove from COF" outfit context menu items to be enabled when appropriate and work properly.

Work on "Take Off - Remove from Current Outfit" and "Wear - Add to Current Outfit" menu options:
- The menu items of the outfit context menu and the My Outfits gear menu are now disabled
  when inappropriate instead of being hidden.
- The menu items get enabled/disabled depending on whether you can wear (take off) anything from the selected outfit.
  (was: depending on whether you're wearing the outfit)
- Changed the way the options work: they now only operate on clothes and attachments.
  "Add to COF" now only adds those body parts that are missing in COF;
  "Remove from COF" doesn't touch body parts at all.

  Without this change both "Add" and "Remove" options would be available simultaneously, because
  any valid outfit contains body parts. I think that would be confusing.
  And you don't expect you body parts to be replaced when doing "Add to COF'. (that's addition, not replacement)

Reviewed by Mike Antipov at https://codereview.productengine.com/secondlife/r/585/

--HG--
branch : product-engine

Fixed updating worn items indication.

Reviewed by Mike Antipov at https://codereview.productengine.com/secondlife/r/551/.

--HG--
branch : product-engine

--HG--
branch : product-engine

reviewed by Neal Orman at https://codereview.productengine.com/secondlife/r/606/

--HG--
branch : product-engine

Fix description:
    Check getParentFloater result.
Note:
    ColorsWatch have no parent Floater in EditWearable side-panel.

--HG--
branch : product-engine

--HG--
branch : product-engine

--HG--
branch : product-engine

* Outfit is loading for the first time
* After user clicks:
 ** Item Context menu > Add
 ** Item Context menu > Replace

Known Issues:
1. For multi-wearable indicator will disappear after first item from the batch is worn.
   Did not fix this to not affect the stability before 2.1 release.
2. To show loading indicator first time we have to notify subscribers of LLAgentWearables.
   For now this is done from the deprecated LLAgentWearables::processAgentInitialWearablesUpdate

Reviewed by Vadim Savchuk at https://codereview.productengine.com/secondlife/r/602/

--HG--
branch : product-engine

--HG--
branch : product-engine

1 Made line editor width configurable for alert notifications.
2 Set line editor width to 300px.

reviwed by Vadim Savchuk at https://codereview.productengine.com/secondlife/r/605/

--HG--
branch : product-engine

Implementation details:
 * Added flag to LLAgentWearables to determining that outfit is changing. Synchronizing it with mLoadingStartedSignal and mLoadedSignal signals.
 * Check this flag when there is no outfit set to show empty title when outfit is being changed.
 * Also updated condition to disable "Wear" button when outfit is being changed.

Additional improvements:
 * Removed reference to parent LLSidepanelAppearance from the LLPanelOutfitsInventory.
 * Now LLSidepanelAppearance is subscribed to mLoadingStartedSignal and mLoadedSignal to update its loading indicator.

Known Issue:
 * When new outfit is being worn its name is shown in title for a short moment (loading indicator is shown at this time). Then it is changed with an empty title and is shown when outfit is already worn.
If necessary it should be investigated and fixed in scope of another issue.

Reviewed by Vadim Savchuk at https://codereview.productengine.com/secondlife/r/593/

--HG--
branch : product-engine

We now point directly to the wiki for Viewer release notes and we
include three digits in the version number. E.g.,

http://wiki.secondlife.com/wiki/Release_Notes/Second Life Beta Viewer/2.1.0

reviewed by Mike Antipov, Loren Shih at https://codereview.productengine.com/secondlife/r/599/

--HG--
branch : product-engine

EXT-6571 FIX - avoid removing links to missing wearables, which fixes a problem with ordering in multi-wearables

Fixed highlight and open item code to work for both categories and items (was previously only working for items).

reviewed by richard

reviewed by Richard

EXT-7823 FIXED Accordion widget was improved to show different message when no_matched_tabs  in panel or no_visible_tabs in panel.

Added "no_matched" and "no_visible" text for TeleportHistory.
+ Added "no_visible" text for My Outfit list.
+ Fixed filtering in TeleportHistory.

Reviewed by Mike Antipov at https://codereview.productengine.com/secondlife/r/591/

--HG--
branch : product-engine

The "Add" item of wearable context menu is now disabled if multiple clothes selected
or when you can't add more wearables of the given type (max number is worn).

Reviewed by Nyx at https://codereview.productengine.com/secondlife/r/595/

--HG--
branch : product-engine

EXT-7475 FIXED Added callback to update verbs in My Inventory SP when tab in inventory panel is changed.

Reviewed by Vadim Savchuk at https://codereview.productengine.com/secondlife/r/597/

--HG--
branch : product-engine

--HG--
branch : product-engine

--HG--
branch : product-engine

Reviewed by Vadim Savchuk and Mike Antipov at https://codereview.productengine.com/secondlife/r/576/

--HG--
branch : product-engine

EXT-7576 FIXED 'Add to Outfit:' panel should shrink the top 'Edit Outfit' list to 1/3 the vertical height

- Increased height of 'Add to Outfit' panel and set animate for layout stack. Animate attrubute was set to true to force proper calculation of layout panels size when one of the layout panels can dynamically change its visibility

Reviewed by Vadim Savchuk at https://codereview.productengine.com/secondlife/r/588/

--HG--
branch : product-engine

EXT-7667 FIXED There is much unnecessary empty space from the right side in the Group profile information

- Increased width of layout panel and its accordion

Reviewed by Mike Antipov at https://codereview.productengine.com/secondlife/r/589/

--HG--
branch : product-engine

--HG--
branch : product-engine

reviewed by Vadim Savchuk at https://codereview.productengine.com/secondlife/r/594/

--HG--
branch : product-engine

--HG--
branch : product-engine

reviwed by Loren Shih at https://codereview.productengine.com/secondlife/r/575/

--HG--
branch : product-engine