EXT-8576 FIXED Only attachments are worn if multi-select items on 'My Outfits' tab and press 'Wear' button.

Reason: avatar appearance was not updated if the last selected item was an attachment.
Fix: make sure appearance is updated afterwards, regardless of items types.

Reviewed by Nyx at https://codereview.productengine.com/secondlife/r/848/

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branch : product-engine