Added admin-mode.

For now it shows/hides columns in the Device List and adds kicking behaviour.
Using $rootScope.adminMode for convenience.

res/app/layout/layout-controller.js

@@ -1,3 +1,19 @@
-module.exports = function LayoutCtrl(LanguageService) {
-  LanguageService.updateLanguage()
-}
+module.exports =
+  function LayoutCtrl(LanguageService, $rootScope, hotkeys, $filter, gettext) {
+    LanguageService.updateLanguage()
+
+
+    function toggleAdminMode() {
+      var enabled = $filter('translate')(gettext('Admin mode has been enabled.'))
+      var disabled = $filter('translate')(gettext('Admin mode has been disabled.'))
+
+      $rootScope.adminMode = !$rootScope.adminMode
+
+      alert($rootScope.adminMode ? enabled : disabled)
+    }
+
+    hotkeys.add({
+      combo: 'up up down down left right left right enter',
+      callback: toggleAdminMode
+    })
+  }