Removie panelview backgrounds from Herald.

Summary: Prior to re-doing responsive form CSS, update the Herald app for no panel backgrounds.

Test Plan: Went through Herald application, see no panels.

Reviewers: epriestley, btrahan

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D4545

src/applications/herald/controller/HeraldTranscriptController.php

@@ -323,8 +323,9 @@ final class HeraldTranscriptController extends HeraldController {
       ));
 
     $panel = new AphrontPanelView();
-    $panel->setHeader('Actions Taken');
+    $panel->setHeader(pht('Actions Taken'));
     $panel->appendChild($table);
+    $panel->setNoBackground();
 
     return $panel;
   }