Make icon setting in Section Headers easier/consistent

Summary: You can already pass other icons, but this makes it a bit simpler.

Test Plan: Test Maniphest, Badges

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D14131

src/applications/diffusion/controller/DiffusionRepositoryController.php

@@ -289,7 +289,8 @@ final class DiffusionRepositoryController extends DiffusionController {
         $repository,
         'description',
         $user);
-      $view->addSectionHeader(pht('Description'));
+      $view->addSectionHeader(
+        pht('Description'), PHUIPropertyListView::ICON_SUMMARY);
       $view->addTextContent($description);
     }