Fixed history view.

Summary:
A lot of history views were empty. This fixes that problem.

Test Plan:
Played with sandbox.

Reviewed By: epriestley
Reviewers: epriestley, jungejason
Commenters: aran
CC: aran, epriestley, tuomaspelkonen
Differential Revision: 316

src/applications/diffusion/controller/history/DiffusionHistoryController.php

@@ -32,6 +32,7 @@ class DiffusionHistoryController extends DiffusionController {
 
     if (!$request->getBool('copies')) {
       $history_query->needDirectChanges(true);
+      $history_query->needChildChanges(true);
     }
 
     $history = $history_query->loadHistory();