Let CycleControl pass commands to its child; let screenlayout respond to unqualified command

modules/core.py

@@ -327,6 +327,7 @@ class WrappingControl(AbstractControl):
         self.child.load_state(state)
 
     def respond_to(self, command):
+        logging.debug('%s.respond_to: Passing command "%s" to child', self.__class__.__name__, command)
         return self.child.respond_to_ex(command)
 
     @property

modules/cycle.py

@@ -120,6 +120,8 @@ class CycleControl(WrappingControl):
         elif command == ':prev':
             self.child.prev()
             return True
+        else:
+            return super().respond_to(command)
 
     def __str__(self):
         next_button = Button.LEFT

modules/screenlayout.py

@@ -41,6 +41,13 @@ class ScreenLayoutCycleAction(OrderedDictCycleAction):
             return True
         return False
 
+    def respond_to(self, command: str):
+        if command == 'screenlayout':
+            self.next()
+            return True
+        else:
+            return super().respond_to(command)
+
     def __str__(self):
         return self.__naming_func(super().__str__())