Also, fix clearing users in an organization when removing the organization.

This patch attempts to query or detect the Olson style timezone
(e.g. America/Chicago) from the database. This is preferred over the
previous code as the previous code would always consider the current
database GMT offset rather than the GMT offset of the date being converted
(which might be on the other side of a DST transition).

This fixes a bug where the search queue would be empty when accessing it via
the navigation link

* FAQ Articles
* FAQ Categories
* Access templates

Also, add mass delete user with tickets

Move collaboration implementation to thread level

Also, fix the links to the ticket queue search (again)