EXT-8150 FIXED (+ button under \"add more\" of outfit editor is unclear)

- Decreased flat list view and folder list view height
- Deleted '+' button from bottom bar
- Added 'Wear Item' button just at the bottom of the list

Reviewed by Vadim Savchuk at https://codereview.productengine.com/secondlife/r/693/

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branch : product-engine