Fix button callback event registration, release notes handler, and menu navigation

tests/test_publisher_failures.py

@@ -17,7 +17,7 @@ class FakeQueue:
     async def get_target_queue_size(self, target_id):
         return len(self.items)
 
-    async def pop_target_post(self, target_id):
+    async def pop_target_post(self, target_id, dispatch_order="order"):
         return self.items.pop(0) if self.items else None
 
     async def push_target_post(self, target_id, payload):