[Calendars/Workspaces] Fixed the issue with creating events from calendar workspaces as well.
* [Orgs/Worklist] Fixed an issue where deleting an organization could result in a blank worklist.
* [CHD-3344] [Mail/Setup/Reply-To] When adding a new 'Reply-To' address, a 'delete' button will no longer be displayed.  The option to delete should only be available when editing.
* [CHD-3311] [Virtual Attendants/Schedule Behavior] Virtual Attendants may now schedule the date for another behavior based on placeholders.
* [CHD-3353] [Virtual Attendants/Mail] Fixed the 'sender is worker' condition on 'New message on a group conversation' Virtual Attendant events when the ticket is created by a sender that is also a worker.
[CHD-3342] [Code Cleanup] Undefined variable: $data in features/cerberusweb.core/api/dao/worker.php on line 94
* [CHD-3338] [Virtual Attendants/Mail] Fixed an issue in Virtual Attendants where the setting of the 'Set Organization' action on the 'New message on a group conversation' was blank after re-editing.
* [CHD-3336] [Mail/Subtotals] Ticket worklists may now be subtotaled by the 'Last Action' field.  The possible actions are New Ticket, Worker Replied, or Recipient Replied.
* [CHD-3335] [Tickets/Bulk/Usability] Using 'Bulk Update' on a ticket worklist will set the value of the 'Updated' field to the current time. This was requested as a way to identify tickets after the fact that were changed in the same batch.
* [CHD-3332] [Mail/Pile Sorter/Merge] When pile sorting a ticket worklist, the 'merge' action is now available for sub-piles.  Previously if you pile sorted by sender, you could merge by domain but not by individual senders.
[Code Cleanup] Whitespace fixes
6.4-rc checkpoint