Allow changing a share after it is started

First of all great app! it's incredibly fast and low latency.

Maybe I'm missing something, but currently if I want to change what is shared in a connection, I tihkn I have to first disconnect it, then share link again because the old session is broken.

Would be very nice to be able to either:

• Disconnect, then reuse the same session (so that the client can just try to continously reconnect instead of erroring out)
• modify an existing connection