Added ability to override radio button behavior when selecting items in popup menus
Added ability to turn on rotation snapping as a setting, with SHIFT just inverting the rot snap mode
Implemented proper asset type filtering, complete with multiple type selection, and listing of active filters in AB footer. Selectable via visibility popup Menu
Moved asset preview button generation from code to template GUI file
added ability to move asset with drag-n-drop(Image asset only so far)
New AB folder icon
Properly link image asset fields to material asset if 'AlwaysPresentImageMaps' config setting is active
This also fixes some insecure behavior relying on %this value eval'ing, which has also been modified to be better.
Also fixes up some old calls for getting menubar menus by internal name, which is no longer supported, instead using the findMenu function call.
