R1:192a11bfdc05

Add PholioMockArchiveController

Summary: Allows closing a mock from the action list. Ref T9414

Test Plan: New Mock, Edit Mock, Close Mock, Open Mock

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Maniphest Tasks: T9414

Differential Revision: https://secure.phabricator.com/D14726