Rebuild query panels on top of EditEngine

Summary: Depends on D20377. Ref T13272. In D20372, I temporarily removed the controls for actually editing Query panels. Restore them.

Test Plan:

• Viewed existing Query panels, saw them working like they did before.
• Created and edited Query panels.

Reviewers: amckinley

Reviewed By: amckinley

Maniphest Tasks: T13272

Differential Revision: https://secure.phabricator.com/D20382