(EXT-6722) Create modified inventory view for "my outfits" tab in top-level...

(EXT-6722) Create modified inventory view for "my outfits" tab in top-level appearance sidebar (tier 2)
llui:
- Added accordion tab title setter.
- Added setters for accordion tab focus changes callbacks.

newview:
- Fixed observer used for outfit items collecting. Added checking number of fetched items.
- Added outfit selection and enabled "replace outfit" and "add to outfit" commands for selected outfit.

Reviewed by Mike Antipov https://codereview.productengine.com/secondlife/r/332/

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branch : product-engine