Remove Controller->getHandle() and Controller->loadHandles()

Summary: Ref T7689. Modernize all callsites of these methods.

Test Plan:
- Poked at dashboards.
  - Pretty sure this code is technically unreachable right now.
- Viewed commit; viewed "Audit Status".
- Viewed a fund; viewed "Payable to"; viewed "Owner".
- Viewed herald rules; viewed "Author"; viewed "Applies To".
- Viewed a Legalpad document; viewed "Contributors".
- Viewed Phame post list; viewed blog; viewed post (viewed "Blog", viewed "Blogger").
- Viewed a macro; viewed "Audio".
- Viewed a Phriction page; viewed "Last Author".
- Viewed a Ponder question; viewed "Author".
- Viewed a Ponder answer; viewed header.
  - Behavior changed very slightly here; whatevs.
- Viewed a Countdown; viewed "Author".

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T7689

Differential Revision: https://secure.phabricator.com/D12210

src/applications/ponder/controller/PonderQuestionViewController.php

@@ -141,15 +141,13 @@ final class PonderQuestionViewController extends PonderController {
       ->setObject($question)
       ->setActionList($actions);
 
-    $this->loadHandles(array($question->getAuthorPHID()));
-
     $view->addProperty(
       pht('Status'),
       PonderQuestionStatus::getQuestionStatusFullName($question->getStatus()));
 
     $view->addProperty(
       pht('Author'),
-      $this->getHandle($question->getAuthorPHID())->renderLink());
+      $viewer->renderHandle($question->getAuthorPHID()));
 
     $view->addProperty(
       pht('Created'),
@@ -221,9 +219,6 @@ final class PonderQuestionViewController extends PonderController {
 
     $out = array();
 
-    $phids = mpull($answers, 'getAuthorPHID');
-    $this->loadHandles($phids);
-
     $xactions = id(new PonderAnswerTransactionQuery())
       ->setViewer($viewer)
       ->withTransactionTypes(array(PhabricatorTransactions::TYPE_COMMENT))
@@ -253,7 +248,7 @@ final class PonderQuestionViewController extends PonderController {
       $out[] = id(new PhabricatorAnchorView())
         ->setAnchorName("A$id");
       $header = id(new PHUIHeaderView())
-        ->setHeader($this->getHandle($author_phid)->getFullName());
+        ->setHeader($viewer->renderHandle($author_phid));
 
       $actions = $this->buildAnswerActions($answer);
       $properties = $this->buildAnswerProperties($answer, $actions);