Modernize Countdown

Summary: Crumbs, phts, and mobile layouts for Countdown.

Test Plan: Tested new, edit and delete timer. Verified timer works. Unable to get 'remove chrome' to work, will investigate.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D5101

src/applications/base/controller/PhabricatorController.php

@@ -170,6 +170,8 @@ abstract class PhabricatorController extends AphrontController {
       $page->setDeviceReady(true);
     }
 
+    $page->setShowChrome(idx($options, 'chrome', true));
+
     $application_menu = $this->buildApplicationMenu();
     if ($application_menu) {
       $page->setApplicationMenu($application_menu);