EXP-1799 FIX -- Replace and Add to Outfit options and Copy to Merchant Outbox...

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.