Clear notifications about commits when viewing them

Summary: We were missing this option on the response, so notifications about commits (e.g., tokens given) don't clear when viewing the commit.

Test Plan: Gave a commit a token with user A, viewed notification with user B, viewed commit with user B and verified notification cleared.

Reviewers: garoevans, btrahan

Reviewed By: garoevans

CC: aran

Differential Revision: https://secure.phabricator.com/D6041

src/applications/diffusion/controller/DiffusionCommitController.php

@@ -360,6 +360,7 @@ final class DiffusionCommitController extends DiffusionController {
       $content,
       array(
         'title' => $commit_id,
+        'pageObjects' => array($commit->getPHID()),
         'dust' => true,
       ));
   }