R1:2e6c69e07ea1

Add DashboardArchiveController

Summary: So Fancy, Much JavaScript. Ref T9414

Test Plan: Archive a Dashboard, Activate a Dashboard, Edit a Dashboard

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Maniphest Tasks: T9414

Differential Revision: https://secure.phabricator.com/D14725