Fix missing setQuoteRef() on Commit detail pages in Diffusion

Summary: Fixes T12253.

Test Plan:
  - Before change: used "Quote Comment", saw "In null, alice wrote:" in quoted text.
  - After change: used "Quote Comment", saw proper reference to the commit/page. Clicked reference, was sent to the comment properly.

{F2859093}

Reviewers: chad, avivey

Reviewed By: avivey

Maniphest Tasks: T12253

Differential Revision: https://secure.phabricator.com/D17343

src/applications/diffusion/controller/DiffusionCommitController.php

@@ -705,7 +705,11 @@ final class DiffusionCommitController extends DiffusionController {
     $timeline = $this->buildTransactionTimeline(
       $commit,
       new PhabricatorAuditTransactionQuery());
+
     $commit->willRenderTimeline($timeline, $this->getRequest());
+
+    $timeline->setQuoteRef($commit->getMonogram());
+
     return $timeline;
   }