Limit notifications to latest 10, instead of 15

Summary: This panel just gets super tall at 15 now that date is on it's own line.

Test Plan: Reload panel, count to 10.

Reviewers: epriestley

Reviewed By: epriestley

Spies: Korvin

Differential Revision: https://secure.phabricator.com/D18486

src/applications/notification/controller/PhabricatorNotificationPanelController.php

@@ -9,7 +9,7 @@ final class PhabricatorNotificationPanelController
     $query = id(new PhabricatorNotificationQuery())
       ->setViewer($viewer)
       ->withUserPHIDs(array($viewer->getPHID()))
-      ->setLimit(15);
+      ->setLimit(10);
 
     $stories = $query->execute();