Finally Control button is implemented.

Also the route /control tries to use the last used device.

res/app/control-panes/control-panes-no-device-controller.js

@@ -0,0 +1,10 @@
+module.exports =
+  function ControlPanesNoDeviceController($location, SettingsService) {
+    var lastUsedDevice = SettingsService.get('lastUsedDevice')
+
+    if (lastUsedDevice) {
+      $location.path('/control/' + lastUsedDevice)
+    } else {
+      $location.path('/')
+    }
+  }