R1:4d12c58dcf86

Allow Pholio mocks to be created and edited without drag-and-drop

Summary: Ref T6523. Allows you to click stuff instead of using drag-and-drop.

Test Plan: On iOS simulator, created and updated a mock.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T6523

Differential Revision: https://secure.phabricator.com/D16088