Merge pull request #2509 from awesomerobot/master

truncating long names in the @ autocompleter
FIX: autocomplete quirks
Merge pull request #2510 from awesomerobot/master

fixing title truncation issues in firefox
FIX: invite security check broke PM viewing for all admins
FIX: correct duplicate granting
Add notes about invites to SSO and local login settings
Merge pull request #2512 from riking/patch-1

Add notes about invites to SSO and local login settings