Convert AphrontDialogView to safe HTML

Summary:
Done by searching for `AphrontDialogView` and then `appendChild()`.

Also added some `pht()`.

Test Plan: None.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D4882

src/applications/daemon/controller/PhabricatorWorkerTaskUpdateController.php

@@ -72,9 +72,8 @@ final class PhabricatorWorkerTaskUpdateController
       case 'retry':
         if ($can_retry) {
           $dialog->setTitle('Really retry task?');
-          $dialog->appendChild(
-            '<p>The task will be put back in the queue and executed '.
-            'again.</p>');
+          $dialog->appendChild(phutil_tag('p', array(), pht(
+            'The task will be put back in the queue and executed again.')));
           $dialog->addSubmitButton('Retry Task');
         } else {
           $dialog->setTitle('Can Not Retry');