2nd Bug-Fix: modules.brightness_choose_n_action

function/modules.py

         if data is True:
             self.set(self.KEY_ACTIVE_DEVICE, self.callback_device_list.index((device, key)))
         else:
-            if self.callback_device_list[self[self.KEY_ACTIVE_DEVICE]][0] == device:
-                self.choose_next_device()
+            if self[self.KEY_ACTIVE_DEVICE] is not None:
+                if self.callback_device_list[self[self.KEY_ACTIVE_DEVICE]][0] == device:
+                    self.choose_next_device()
 
     def choose_prev_device(self, device=None, key=None, data=None):
         if self[self.KEY_ACTIVE_DEVICE] is not None: