EXT-8205 FIXED (Items in \"Add more\" panel are not sorted by name)

- Modified LLWearableItemTypeNameComparator so that it can be more reusable and adjustable
- Set LLWearableItemTypeNameComparator for WearableItemsList ('List view' of 'Add More' panel) due to sort clothings by name
- Modified and applied patch form https://codereview.productengine.com/secondlife/r/620/diff/2/#index_header. This patch was discarded because specification was changed

Reviewed by Mike Antipov and Vadim Savchuk at https://codereview.productengine.com/secondlife/r/765/

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branch : product-engine