Attempt to fix issue with default outfit icon on Mac

Changed default outfit icon

Fixed Mac build issue

1) Made code clean-up
2) Removed constants in code via #define and introduced parametres which can ne set in XML instead
3) Made refactoring of some methods
4) Removed non-functional item "Load assets" from outfit gear-menu

Сhanging default photo for outfit

Added ellipsis when outfit name is truncated to one line

Fixed build issues under Linux

Added creating links to photos via DragnDrop

Changed to store uploaded photos as links in outfit folders

Merge with changes for Mac

Corrected typo "foto" to "photo"

Fixed Mac specific build issues

1) Changed algorithm for building gallery, which fixed item cropping when
switching between tabs in Appearance floater
2) Fixed gap between items in partially fille row

Pull in updated LLCEFLib with settings option to turn off WebRTC media and modify the setting in viewer code - nuclear fix for MAINT-6060

Removed "close by owner" item form chiclet's right-click menu

Remove notifications of muted agents

Added the ability to close all notifications from one owner at once

1)Added visual hilighting of worn outfit
2)Fixed colors  of selection borders to fit initial design

Visual selection of outfit implemented

MAINT-5962: Added routine for checking MoaP double click and forwarding those double click events into to the plugin.