title: JavaFX: Menubar width across entire frame
body: <p>I'm using NetBeans and SceneBuilder to make a JavaFX GUI. My question is among the three files (the FXML, the controller, and the java file) what do I need to do to make the width of my menubar expand when the user expands the stage (or anchor pane, please also educate me on the proper term)?</p>
  
  <p>Thanks!
  ~Bricks</p>