SH-1427 Fix for spot lights not working properly on alpha objects, and fix for alpha lighting of point lights not matching deferred lights.

Reverting background fetch on an item to the old fetFromServer call to fix regression bug in inventory late loading

Reverting rev 22217 changes to background fetch so search and recent will fully fetch user inventory

Reviewed by davep.

EXP-1799 FIX -- Replace and Add to Outfit options and Copy to Merchant Outbox options can appear in invalid state when a valid folder is last selection
EXP-1834 FIX -- Right click context menus on Folders in Merchant Outbox and Library folders can show all inventory options including admin options
EXP-1835 FIX -- Right clicking on a folder and selecting New Folder creates folder under My Inventory not within selected folder

* Updated folder context menu building to build full options in one step or
  trigger a load which will rebuild top-level context menu for all selected
  items when complete.  Previous code had an implicit assumption that the
  selected folder was the only selection after background fetch.

* Refactored LLFolderBridge::buildContextMenu fetch to clear and rebuild basic
  context menu options after the fetch rather than trying to merge the two.

* Modified build context menu code to not disable items that are invisible so
  secondary background fetch can coalesce menu options with proper state.
* Removed "Move to Merchant Outbox" context menu option.

EXP-1824 FIX Received Items panel does not collapse correct when Height of panel is maximized in Inventory window

EXP-1829 FIX -- Selecting a valid item last allows other selected invalid items to be copied to Outbox with context menu option

* Updated context menu default enabled state to use the last state rather than
  TRUE.  Once per frame, the states are all reset to TRUE so this has the effect
  of AND'ing together successive buildContextMenu functions rather than ignoring
  previous states.

* Updated auto-open behavior to ignore items that are already open.

EXP-1827 FIX -- Drag area in outbox does not always highlight green when indicating a top level drop

* Updated the outbox drop area highlight to include top level drops within the
  outbox inventory panel itself.

SH-2794 Fix for bad textures on some hardware when vbo mapping disabled (always use GL_STREAM_DRAW as the usage hint when mapping is disabled as geometry will be uploaded again and again)