R1:eef257250887

Replace workboard task creation with EditEngine

Summary: Ref T9908. This is the last of the things that need to swap over.

Test Plan:
- Created tasks from a workboard.
- Created tasks in different columns.
- Edited tasks.
- Used `?parent=..`.
- Verified that default edit form config now affects comment actions.
- No more weird comment thing on forms, at least for now.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T9908

Differential Revision: https://secure.phabricator.com/D14715