* [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 6.7
* [Workspaces/Dashboards/Widgets/Performance] The caching on dashboards can now be configured per-widget.  By setting a higher cache TTL (time-to-live) on infrequently used or changed data, page generation performance is improved.  The default cache lifetime is set to 60 seconds on every widget during the migration. Refreshing a widget manually automatically uses the latest data and updates the cache.