Move even more rendering into SearchEngine

Summary: Ref T4986. I think this is the last of the easy ones, there are about 10 not-quite-so-trivial ones left.

Test Plan:
  - Viewed app results.
  - Created panels.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T4986

Differential Revision: https://secure.phabricator.com/D9025

src/applications/repository/query/PhabricatorRepositoryPushLogSearchEngine.php

@@ -3,6 +3,10 @@
 final class PhabricatorRepositoryPushLogSearchEngine
   extends PhabricatorApplicationSearchEngine {
 
+  public function getApplicationClassName() {
+    return 'PhabricatorApplicationDiffusion';
+  }
+
   public function buildSavedQueryFromRequest(AphrontRequest $request) {
     $saved = new PhabricatorSavedQuery();