Normalize 'user name' text to 'username' and tweak some phrases
Fix unexpectedly strict username history permission check (Effected v4.0.6 only)
Fix "Display previous username list to" option not applying as expected
Fix "Username change interval" being ignored when computing the next username change time based on the XF option "Minimum time between username changes"
Fix sending username change to moderators who shouldn't see the alerts (ie moderators who can't approve username changes)
Fix XF2.1 to XF2.2 username migration did not update username_date/username_date_visible columns
Fix username merging does not update username_date/username_date_visible columns when adding a username change record
On install, rebuild username_date/username_date_visible columns for user.
Add "Display mini-avatars in quotes" option to support displaying the mini-avatar in quotes, may require changes to quoting styling to fit the smallest user avatar (24x24 px)