Add a page for toggling the cookie used for the new layout experiment

static/js/pages/exp-new-layout.js

@@ -0,0 +1,19 @@
+(function() {
+  /**
+   * Experiment enable page: New layout
+   */
+  angular.module('quayPages').config(['pages', function(pages) {
+    pages.create('exp-new-layout', 'exp-new-layout.html', ExpCtrl, {
+      'newLayout': true
+    });
+  }]);
+
+  function ExpCtrl($scope, CookieService) {
+    $scope.isEnabled = CookieService.get('quay.exp-new-layout') == 'true';
+
+    $scope.setEnabled = function(value) {
+      $scope.isEnabled = value;
+      CookieService.putPermanent('quay.exp-new-layout', value.toString());
+    };
+  }
+}())