- Fixed it being possible to accept a trade even if it was declined by sending a new request.
- Fixed that on newer mc versions clicking in your inventory after accepting the trade made a ghost item appear due to the title update.
- Made the gui title only update if it has actually changed. This stops some useless packets from being sent.
- Now if a trade is aborted and the player's inventory is full, the items are dropped on the ground. (there was already a full inventory check to prevent this, but somehow players managed to still lose items, so this should fix that)