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/differential/controller/DifferentialCommentSaveController.php

@@ -60,10 +60,9 @@ final class DifferentialCommentSaveController extends DifferentialController {
 
       if (strlen($comment) || $has_inlines) {
         $dialog->addSubmitButton(pht('Post as Comment'));
-        $dialog->appendChild('<br />');
-        $dialog->appendChild(
-          '<p>'.pht('Do you want to post your feedback anyway, as a normal '.
-          'comment?').'</p>');
+        $dialog->appendChild(phutil_tag('br'));
+        $dialog->appendChild(phutil_tag('p', array(), pht(
+          'Do you want to post your feedback anyway, as a normal comment?')));
       }
 
       return id(new AphrontDialogResponse())->setDialog($dialog);