connection count doesn't go down after closing a remote viewing tab

[alexpmorris]

I see there is code to capture a potential disconnect and reduce the connection count. However, from playing around with this extension it doesn't seem to detect any disconnects and the connection count keeps going up upon disconnect/reconnect. As an additional side-effect, it seems to still try to stream to all those closed viewers and starts slowing down the source computer.

Perhaps the addition of a connection timeout / heartbeat could help catch those missed disconnects.