Normalize Paste edit header

Summary: I've been rolling out "Edit ObjectName: ObjectTitle" consistantly here.

Test Plan: Review Paste edit title

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D15586

src/applications/paste/editor/PhabricatorPasteEditEngine.php

@@ -35,7 +35,7 @@ final class PhabricatorPasteEditEngine
   }
 
   protected function getObjectEditTitleText($object) {
-    return pht('Edit %s %s', $object->getMonogram(), $object->getTitle());
+    return pht('Edit Paste: %s', $object->getTitle());
   }
 
   protected function getObjectEditShortText($object) {