Allow dashboard panels to be found by monogram

Summary:
Just add the monogram to the datasource's `name` field
so that it will match when typing Wnn in the typeahead field.

Test Plan:
Tested locally on my dev phab. Try searching for a panel
by monogram in the 'Add existing panel' dialog on the
'arrange workboard' interface.

Previously: typing W123 showed no results.

After this change: typing W123 finds the panel W123

Reviewers: chad, epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D18121

src/applications/dashboard/typeahead/PhabricatorDashboardPanelDatasource.php

@@ -42,8 +42,7 @@ final class PhabricatorDashboardPanelDatasource
       $properties = $panel->getProperties();
 
       $result = id(new PhabricatorTypeaheadResult())
-        ->setName($panel->getName())
-        ->setDisplayName($monogram.' '.$panel->getName())
+        ->setName($monogram.' '.$panel->getName())
         ->setPHID($id)
         ->setIcon($impl->getIcon())
         ->addAttribute($type_text);