Implement card style and extras for object item lists

Summary:
Initial pass at elements appearing on M10.

Glaring omissions:

  - I cut a single icon out of M10 in a haphazard way.
  - No linear graident texture on the cards.

Test Plan:
{F35248}
{F35249}

Reviewers: chad

Reviewed By: chad

CC: aran

Differential Revision: https://secure.phabricator.com/D5311

src/applications/project/controller/PhabricatorProjectListController.php

@@ -108,7 +108,7 @@ final class PhabricatorProjectListController
     }
 
     $list = new PhabricatorObjectItemListView();
-    $list->setStackable();
+    $list->setStackable(true);
     foreach ($rows as $row) {
       $item = id(new PhabricatorObjectItemView())
         ->setHeader($row[0])