EXT-7847 FIXED Disabled "trash" button if an item is selected inside selected outfit.

- Added bool mItemSelected variable and getter for it to determine if the selection inside outfit exists, and used it when determining whether to enable "Trash" button in My Outfits.

Reviewed by Vadim Savchuk and Neal Orman at https://codereview.productengine.com/secondlife/r/600/

--HG--
branch : product-engine