title: Open a Settings Window
body: <p>I would like to create a Settings Window, when I klick on a MenuItem.<br>
  On the settings screen I want to change the Ip Adress of an server.</p>
  
  <p>The main screen is created with the Scenebuilder but I would like to create the settings window manual. Currently I have no idea where to start. </p>
  
  <p>Shall i create a class wich extends Application and open it when I click the Menu Item or can I code it directly in the controller class of the main screen ?</p>
  
  <p>Thank you for your help</p>