User Mentions Improvements by Xon 2.10.6

• Add "view public groups" permission to registered and guest user-groups on install
• Remove bad permission entries leftover from very old versions; xenforo's permission cleanup has likely zapped these anyway.
• Force global namespace for functions which are known to be optimizable to bytecode in php
• Minor code cleanup

• Compatibility update when resolving an extended class to the root class
• Require Standard Library by Xon v1.2.0+

• Compatibility fix for @Lawrence's Conversation Tools add-on

• Fix possible error when approving user account with some custom fields configurations

Fix "Call to a member function offsetExists() on null" that could occur with some user custom fields configurations

• Fix quoted email phrase
• Improve compatibility of usergroup mention tagging between XF versions (Fix XF2.2.0B2 support)

• Fix possible error for guest posts with user mentions

• Requires php 7.0+
• Now depends on Standard Library by Xon
• Supports XF2.2

• Fix incorrect access level when extending user changelog

• Fix user change log showing raw column names added by this add-on