[Xen-Soluce] Avatar Gallery 2.2.0 Fix 2

Note :
- Changed features :

• New design for the avatar gallery.
• Add support for secondary usergroup. (@Tamara-Jasmin #Report)

Note :
- Bug fixes :

• The 2.1.0 Fix 1 doesn't work.

Note :
- Bug fixes :

• Table "xf_xs_avatar_gallery" doesn't exist after upgrade. (Mian Shahid #Report)

Note :
- New features :

• Added user groups permission for category : ACP -> Users -> Avatar gallery. (@Tamara-Jasmin #Suggestion)

Note :
- Bug fixes :

• Template modification to add avatar gallery to registration page not working in 2.1.3.

Note :
- Bug fixes :

• Avatar saved even if you don't click "ok". (sebouley #Report)