Updates llfloatergroups to be a lot similar to upstream
- Adds LLFLoaterGroupPicker::removeNoneOption and changes LLFloaterGroupPicker to use modern style callback
- Switched from using per ui xml string for the none entry in groups to the strings.xml one, updated and cleaned existing translations to use this.
- Changes LLFLoaterGroupPicker into an instance tracker by id, because it was already acting like one.
Updates llpanelpermissions RLVa bits and fixes last owner label never enabled
Updated French Translation from Nomade's Zip for MultiWear.
Updated Translations to use basically the same format, and not have some cruft.
Abouts updated to include Spanish translators: Damian Zhaoying, and Franxizco Romano.
