Update Settings/Config UI

Summary: Testing out a new 'nav' layout in Settings / Config. Spent a few days here and couldn't find much better overall.

Test Plan: View each page in Settings and in Config. Save some config options. Test mobile, desktop, tablet.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin

Differential Revision: https://secure.phabricator.com/D15659

src/applications/config/controller/PhabricatorConfigCacheController.php

@@ -18,16 +18,17 @@ final class PhabricatorConfigCacheController
     $code_box = $this->renderCodeBox();
     $data_box = $this->renderDataBox();
 
-    $nav->appendChild(
-      array(
-        $crumbs,
+    $view = id(new PHUITwoColumnView())
+      ->setNavigation($nav)
+      ->setMainColumn(array(
         $code_box,
         $data_box,
-      ));
+    ));
 
     return $this->newPage()
       ->setTitle($title)
-      ->appendChild($nav);
+      ->setCrumbs($crumbs)
+      ->appendChild($view);
   }
 
   private function renderCodeBox() {