During authentication cycle the iceServers URL params are not passed through the various redirects. The result is that the when we finally return back to the conference page authenticated and with the JWT token the iceServers URL param is lost.

Fixes #14672.

When passing url param config.subject="Example%20Title" we will send config.subject%22%3A%22%2522Example%2520Title%2522%22 which is double quotes.

The URL.hash returns the # sign, and so we always ignore the first parameter.

ref(authentication): handle joining in low bandwidth mode

Fixes jitsi/jitsi-meet-electron#902.