EXT-7241 FIXED Changed all "Edit Appearance" links to "Change Outfit" and...

EXT-7241 FIXED Changed all "Edit Appearance" links to "Change Outfit" and pointed them to the My Outfits tab.

Renamed the following menu items to "Change Outfit" and made them open My Outfits tab:
- Avatar in-world context menu -> My Appearance.
- Avatar inspector menu -> My Appearance.
- Me -> My Appearance.

To enable the Appearance SP switch to My outfits I cleaned up the logic of switching between my outfits <-> edit outfit <-> edit wearable panels.

Also done the following cleanups and minor improvements:
- Removed unused LLSidepanelAppearance::mEditBtn and mLookInfoType members.
- Removed empty LLSidepanelAppearance::updateVerbs() method.
- Made the "params" argument of LLSideTray::showPanel() and togglePanel() optional.

Reviewed by Nyx at https://codereview.productengine.com/secondlife/r/389/

--HG--
branch : product-engine