Move workboard card edits to EditEngine in Maniphest
Summary: Ref T9908. This drives workboard card edits through the new stuff. Bit of copy-paste but the old one will get deleted soon.
- Edited some cards.
- Changed priority on a priority-sorted board, saw proper re-sort
- Removed board project, saw card vanish properly.
Reviewed By: chad
Maniphest Tasks: T9908
Differential Revision: https://secure.phabricator.com/D14712