Known issues and workarounds

[EDM115]

• [ ] Service messages can't be forwarded. Or, we can copy them then send, but it's useless
• [ ] Maybe use Client.forward_messages() instead of Message.forward() -> Less calls, faster
• [ ] Add way to avoid duplicate messages (for files, check their unique ID’s) | Requested by David Shadow, and it's a very good idea
• [ ] For forwarding without tag, the only way is to use Client.send_message() with the message to forward as source. It will make a copy