Add support for branch-related configuration to new Repository edit workflow

Summary: Ref T2231. Modernizes editing "Default Branch", "Track Only", and "Autoclose Only".

Test Plan: See screenshots.

Reviewers: btrahan, chad

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T2231

Differential Revision: https://secure.phabricator.com/D7399

src/applications/diffusion/application/PhabricatorApplicationDiffusion.php

@@ -69,6 +69,7 @@ final class PhabricatorApplicationDiffusion extends PhabricatorApplication {
             'encoding/' => 'DiffusionRepositoryEditEncodingController',
             'activate/' => 'DiffusionRepositoryEditActivateController',
             'policy/' => 'DiffusionRepositoryEditPolicyController',
+            'branches/' => 'DiffusionRepositoryEditBranchesController',
           ),
         ),
         'inline/' => array(