Currently to stop the server you have to quit UI. And to close the UI you have to quit the UI again.
When you want to stop the server and restart the server again this is a pain.
It would be useful (and more consistent) if there was another two buttons on the UI - Start Server and Stop Server. Then you could stop the server to allow settings to take hold then restart the server. And it would make shutting down the app a consistent experience Quit being Quit every time not Quit Stop the Server and Quit Close the App.