[Code Cleanup] Tagged plugins as version 6.6.4
* [Workspaces/Dashboards] Fixed an issue where the Ajax request could be sent twice when widgets were reordered on a workspace dashboard.  This didn't cause any problems, it was just inefficient.
6.6.4-checkpoint
* [Worklists/Broadcast] Fixed an issue when previewing a plaintext broadcast on a ticket worklist. Multibyte (UTF-8) characters like umlauts were being corrupted.
6.6.4-checkpoint
Merge branch '6.6.4' into stable