Fix 'Call already ongoing' about webrtcomm

[atsakiridis]

Here's a good reproduction from JJ that might help get to the bottom of this:

https://gist.github.com/atsakiridis/68e58e717bd9c1b6da2f18bb486314bd

So what seems to happen is that:

1. JJs talks using Olympus and then leaves the laptop running overnight
2. At some point the networking is shut down and the websocket is closed
3. Next day he logs out and logs back in successfully (registration is successful)
4. He tries to make a call but he gets 'call already ongoing' issue on the web console

So the issue seems to be that in those cases the state is messed up somehow