This reverts commit 92499ce1.

# Conflicts:
#	indra/newview/llinventorybridge.cpp
#	indra/newview/llinventorypanel.cpp
#	indra/newview/llinventorypanel.h

Attempting to create a settings inventory item on a non-eep region will now show a visible failure message to the user. Menu items for greating settings in inventory are disabled on non eep regions.

* Opening new inventory via Control-Shift-I shortcut uses legacy and potentinally dangerous code path
* Closing new inventory windows don't release memory
* During shutdown legacy and inoperable code for inventory window cleanup is called
* Remove old and unused inventory legacy code

CHUI-849 : WIP : Prevents Finding Widgets in highly used code by getting pointers to widgets in PostBuild

EXP-929 FIX -- First Direct Delivery item purchased while logged in: Received Items folder visible in inventory and item not visible in Received items panel - no badge count update

* Inbox and Outbox inventory panels now live in their own XML files and are hot loaded into place when appropriate, like when the "Received Items" folder is first created, for example.
* The Inbox and Outbox panels now show relevant default messages when the folders are empty or do not exist
* Added LLInventoryCategoryAddedObserver, a new inventory observer type to observe added folders
* Hacked LLInventoryPanel to properly set up inbox and outbox inventory views for the "Received Items" folder and the "Merchant Outbox" folder that aren't created with the proper system folder type
* Changed inventory badge count computation to use LLFolderView rather than the inventory directly
* Applied various focus, selection and other inbox fixes to the outbox

Reviewed by Richard.

EXP-910 FIX -- Newness badge shown on suitcase inventory icon when InventoryDisplayInbox is set to False
EXP-895 FIX -- Selecting items in Marketplace Inbox does not change focus in inventory panel away from items selected in inventory panel

* Main inventory, outbox and inbox all clear the selection of the others when they gain focus
* The Fresh Item Count badge is no longer displayed on the inventory side tab button when the inbox is disabled
* The New Item Count text is no longer displayed.  (we will enable it again when freshness is supported)

STORM-316 FIXED Added an item to inventory gear menu to control "Sort System Folders to Top" option (was always "true").
Changed inventory gear menu sort items - now they have check marks on the left.
Made inventory sort options persist across sessions.

STORM-426 FIXED Menu button no longer looked pressed while its menu is displayed by another control.
- LLMenuGL in menu button replaced by LLToggleableMenu that handles visibility change upon clicks inside specific button rect.
- Added visibility change signal to LLToggleableMenu to update menu button pressed state.
- Added using menu handle in LLMenuButton.

- Changed type of gear menu buttons from LLButton to LLMenuButton in all sidebar panels where gear menu button is used.

- Added setMenuPosition(), setMenu() and updateMenuOrigin() to the LLMenuButton.

- Moved actions common for displaying a context menu to LLMenuButton::toggleMenu().

- In all sidebar panels where LLButton was replaced with LLMenuButton the following steps were taken:
    1. setting gearMenu and its position relative to the menuButton with LLMenuButton::setMenu()
    2. setting mouse down callback for the menuButton if needed.
    3. calculating the menu origin point with LLMenuButton::updateMenuOrigin() in mouse down callback

Backing out changeset fe6c8e0a4a23 (which was made to fix STORM-263).

We'll examine and fix the faulty changes.

- In all places of sidebar panel where gear menu button is used changed type of gear menu buttons from LLButton to LLMenuButton

- Added setMenuPosition and setMenu to the LLMenuButton interface as public methods

- In all sidebar panels where LLButton was replaced with LLMenuButton the algorithm of replacing is simple and the same for all sidebar panels.
  In general the algorithm is:
    1. set gearMenu to the menuButton using LLMenuButton::setMenu
    2. set mouse down callback for the menuButton
    3. in callback for mouse down set the menu position where it should be shown using LLMenuButton::setMenuPosition

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

--HG--
branch : product-engine

- \"options_gear_btn\", \"trash_btn\" and \"add_btn\" now initialized using getChild of the main inventory panel (to avoid another break if the \"bottom_panel\"'s control class will be changed again from LLLayoutStack to something other, e. g. reverted back to LLPanel)
- mTrashButton member was added (which corresponds to \"trash_btn\" control) to optimize performance a little: LLPanelMainInventory::updateListCommands() updates \"trash_btn\"'s enabled state, so to avoid searching using getChild() again and again, a separate member was created.

Reviewed by Mike Antipov at https://codereview.productengine.com/secondlife/r/401/

--HG--
branch : product-engine

Moved # items fetched string into panel_main_inventory (out of floater_inventory) so that it's shared by all inventory views.

--HG--
branch : product-engine

For EXT-3500: Make InventorySP and AppearanceSP filters behave like it does in LandmarksSP and PeopleSP.  This covers the InventorySP part.

--HG--
branch : avatar-pipeline

The text in the search editor is now properly kept updated.

Added save as to texture preview floater.  Fixed behavior of save as (was only working for textures, not snapshots).
Removed advanced menu entry for save texture as (refused to work after multiple implementations).