Minor updates (09/14/2015)

A number of minor updates this morning:
1) If you invited a user, patrol, or mailing list to an event, and then deleted that user, patrol, or mailing list, you would receive an error message trying to edit the event later. This is fixed.
2) The access level names listed on the new invite users page were not consistent with the names listed on the privileges tab, causing confusion. Fixed!
3) The "Start Achievement" button on user profiles was very slow. We've optimized the page to make it much faster.
4) Various improvements to our help desk application to make us more efficient.