Summary: Fixes T4299, Add status dropdown to mock edit view
Test Plan: Edit mock, close mock, thumbnail title should read (Disabled). Default mocks list should show only open mocks.
Reviewers: #blessed_reviewers, epriestley
Reviewed By: #blessed_reviewers, epriestley
Subscribers: chad, epriestley, Korvin
Maniphest Tasks: T4299
Differential Revision: https://secure.phabricator.com/D9145
