watchtogether improvements:
- fixed an issue which caused generated invite codes would be too long
- fixed an issue which caused generated invite codes to be invalid
- fixed an issue where the host wouldn't proxy updates to other lobby participants
- fixed an issue which would cause an infinite loop of torrent downloading
- the user now gets feedback if the w2g connection timmed out
- fixed an issue which removed the lobby UI when clicking "cancel" when inviting another member