Allow decorators to be stacked

E.g:

app1.on_message(...)
app2.on_message(...)
app3.on_message(...)
def on_message(client, message):
    ...

pyrogram/client/methods/decorators/on_callback_query.py

@@ -37,6 +37,9 @@ class OnCallbackQuery(BaseClient):
         """
 
         def decorator(func):
+            if isinstance(func, tuple):
+                func = func[0].callback
+
             handler = pyrogram.CallbackQueryHandler(func, filters)
 
             if isinstance(self, Filter):

pyrogram/client/methods/decorators/on_deleted_messages.py

@@ -37,6 +37,9 @@ class OnDeletedMessages(BaseClient):
         """
 
         def decorator(func):
+            if isinstance(func, tuple):
+                func = func[0].callback
+
             handler = pyrogram.DeletedMessagesHandler(func, filters)
 
             if isinstance(self, Filter):

pyrogram/client/methods/decorators/on_message.py

@@ -37,6 +37,9 @@ class OnMessage(BaseClient):
         """
 
         def decorator(func):
+            if isinstance(func, tuple):
+                func = func[0].callback
+
             handler = pyrogram.MessageHandler(func, filters)
 
             if isinstance(self, Filter):

pyrogram/client/methods/decorators/on_raw_update.py

@@ -32,6 +32,9 @@ class OnRawUpdate(BaseClient):
         """
 
         def decorator(func):
+            if isinstance(func, tuple):
+                func = func[0].callback
+
             handler = pyrogram.RawUpdateHandler(func)
 
             if isinstance(self, int):

pyrogram/client/methods/decorators/on_user_status.py

@@ -36,6 +36,9 @@ class OnUserStatus(BaseClient):
         """
 
         def decorator(func):
+            if isinstance(func, tuple):
+                func = func[0].callback
+
             handler = pyrogram.UserStatusHandler(func, filters)
 
             if isinstance(self, Filter):