Group Maniphest Tasks by Priority on Profiles

Summary: Ref T12423. Set the grouping by priority. Note this doesn't render headers but I don't want to spend a lot of time on this.

Test Plan: Review tasks in my sandbox, see them ordered by priority.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Maniphest Tasks: T12423

Differential Revision: https://secure.phabricator.com/D18046

src/applications/people/controller/PhabricatorPeopleProfileTasksController.php

@@ -61,6 +61,7 @@ final class PhabricatorPeopleProfileTasksController
       ->withStatuses($open)
       ->needProjectPHIDs(true)
       ->setLimit(100)
+      ->setGroupBy(ManiphestTaskQuery::GROUP_PRIORITY)
       ->execute();
 
     $handles = ManiphestTaskListView::loadTaskHandles($viewer, $tasks);