[Feature Request] Retain control after reconnect

[m1k1o]

If reconnect happens while you are controlling, you loose control. Although, there should be some grace period when user disconnects and his control is taken back.

But since our user diappears on server completly on reconnect, and will be created when he joins again, it would be lot of refactoring (after #48 is finished).

It could be done purely on client, simply storing that information and requesting control again. It could happen, that someone "steals" control while another user is experiencing disconnects. But admin can take his control anyway, so it should not be an issue.