Add hover state to stackable list.

Summary: Adds a hover state, helpful for large stacked lists. Also applied dust to projects and config to go with the hover changes.

Test Plan: Config, Projects

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D5223

src/applications/config/controller/PhabricatorConfigAllController.php

@@ -91,6 +91,7 @@ final class PhabricatorConfigAllController
       array(
         'title' => $title,
         'device' => true,
+        'dust' => true,
       ));
   }