When creating or editing a card on a sorted/grouped workboard, adjust headers appropriately
Depends on D20270. Ref T10333. If you create a task with a new owner, or edit a task and change the priority/owner, we want to move it (and possibly create a new header) when the response comes back.
Make sure the response includes the appropriate details about the object's header and position.
- Grouped by Owner.
- Created a new task with a new owner, saw the header appear.
- Edited a task and changed it to give it a new owner, saw the header appear.
Reviewed By: amckinley
Maniphest Tasks: T10333
Differential Revision: https://secure.phabricator.com/D20271