Few changes -
* webview: Show connection failure per server.
* network: Try to reconnect diff servers.
* Fixes concern that some proxy networks may allow only specific servers
to be reachable.
* domains: Show network error on server invalidation.
* webview: Handle network errors in preload script.
Fixes: #591, #312.
We check user status every 15 seconds and update the status accordingly
to every organization connected. The webapp then uses this system presence data
we send to set the user status based on system activity.
Fixes#352.
