Summary: Ref T1703. Put a more reasonable UI than "blob of JSON" on top of this.
Test Plan:
Reordered, enabled and disabled user profile fields.
{F49317}
Reviewers: btrahan, chad
Reviewed By: chad
CC: aran
Maniphest Tasks: T1703
Differential Revision: https://secure.phabricator.com/D6393
