* Removed redundant workd ''ticket'' from extension methods where it made sense.
* Added `ITicketManipulator.filter_actions()`.
* `ITicketWorkflow.get_action_controls()` now returns a tuple in the form `(label, controls)`.
* `ITicketManipulator` filters now filter the list elements in-place.
* Fixed bug where control tooltips were bleeding into the next control displayed.
