Set viewer for all handles loaded in controllers

Summary:
I've replaced all `id(new PhabricatorObjectHandleData(...))->loadHandles()` by `$this->loadViewerHandles(...)`.
Lint caught one usage in a static method.

Test Plan: Displayed revision with sporadic author.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D3432

src/applications/ponder/controller/PonderQuestionViewController.php

@@ -41,8 +41,7 @@ final class PonderQuestionViewController extends PonderController {
       $object_phids[] = $answer->getAuthorPHID();
     }
 
-    $handles = id(new PhabricatorObjectHandleData($object_phids))
-      ->loadHandles();
+    $handles = $this->loadViewerHandles($object_phids);
 
     $detail_panel = new PonderQuestionDetailView();
     $detail_panel