EXT-8082 FIXED Fixed viewer crash in outfit list accordion.

Details:
1 Avoided memory leak of LLAccordionCtrlTab in LLOutfitsList::refreshList method.
2 Provided resetting selection in LLAccordionCtrl::removeCollapsibleCtrl method.

reviewed by Vadim Savchuk at https://codereview.productengine.com/secondlife/r/701/

--HG--
branch : product-engine