EXT-6633 enable basic multiwearables demo

Fixed several areas of code that were not multi-wearables enabled.
Specifically allowed for the wearing of created outfits that had links to
multiple items of the same type. Such outfits can be created by dragging
multiple items of the same type into an unworn outfit folder. When you
wear the outfit, all items (up to 5 per type) should be worn. Does not
affect right-click options or other buttons.

Code reviewed by Vir.