Allow form configurations to retitle and reorder forms and add preambles
Summary:
Ref T9132. This just makes edited forms do something, albeit not anything very useful yet.
You can now edit a form and:
- Retitle it;
- add a preamble (instructions on top of the form); and
- reorder the form's fields.
Test Plan:
Reviewers: chad
Reviewed By: chad
Subscribers: hach-que
Maniphest Tasks: T9132
Differential Revision: https://secure.phabricator.com/D14503