Show error message if WebSocket fails to connect

[Nockm]

[electronstudio]

and more importantly if socket gets disconnected. perhaps a red/green indicator to show if currently connected?

[electronstudio]

also, either have a connect button, or maybe better just keep trying to re-connect automatically every second.

[electronstudio]

currently if the websocket is idle for 30 seconds, Jetty disconnects it. i have tried to override this but not suceeded so far. but having auto-reconnect would fix it anyway.

[electronstudio]

we're now showing errors in the logs, and we are doing auto-reconnect. might be nice to have a small red/yellow/green indicator for the user but not sure if it's useful so this is low priority.

[Nockm]

During attempting to reconnect, a notification is visible on the top.

This is done via logger.js which now supports setting a notification message. I should probably rename Logger to something else now that it seems to be some sort of messaging hub.