Clear project notifications when viewing workboard or project detail

Summary: Fixes T8112.

Test Plan:
  - Sent notifications.
  - Notied them un-cleared by clicking them (profile or workboard).
  - Made changes.
  - Verified profile and workboard both clear them.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T8112

Differential Revision: https://secure.phabricator.com/D12771

src/applications/project/controller/PhabricatorProjectBoardViewController.php

@@ -383,6 +383,7 @@ final class PhabricatorProjectBoardViewController
       array(
         'title' => pht('%s Board', $project->getName()),
         'showFooter' => false,
+        'pageObjects' => array($project->getPHID()),
       ));
   }
 

src/applications/project/controller/PhabricatorProjectProfileController.php

@@ -67,6 +67,7 @@ final class PhabricatorProjectProfileController
       $nav,
       array(
         'title' => $project->getName(),
+        'pageObjects' => array($project->getPHID()),
       ));
   }