Allow repositories to be activate/deactivated in a transaction-aware way

Summary: Adds activate/deactivate action plus transactions.

Test Plan: See screenshot.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Differential Revision: https://secure.phabricator.com/D7057

src/applications/diffusion/application/PhabricatorApplicationDiffusion.php

@@ -67,6 +67,7 @@ final class PhabricatorApplicationDiffusion extends PhabricatorApplication {
             '' => 'DiffusionRepositoryEditController',
             'basic/' => 'DiffusionRepositoryEditBasicController',
             'encoding/' => 'DiffusionRepositoryEditEncodingController',
+            'activate/' => 'DiffusionRepositoryEditActivateController',
           ),
         ),
         'inline/' => array(