User Mentions Improvements by Xon 2.10.6

• Rework user mentioned/quoted email templates
  • Support sending quoted text when mentioned (or quoted)
  • Can be up to X characters, all characters or no characters.
• User mentioned/quoted emails now properly support email opt-out links
• User mentioned emails now support:
  • Reports
  • Profile Posts
  • Profile Post Comments
• Note; these content types are not suitable for large volumes of mentions generating emails due to this

• Remove options for unimplemented mini-avatar feature
• Workaround for when saving a user group, XF2 rebuilds all permission combinations when >8 combinations exist.
  • Only trigger a rebuild if changes are made, simply clicking save doesn't force a rebuild.
  • When using a background worker, only rebuild changed combinations not all permissions.

• Fix guest posting support