title: Get full Height of the window pop-up include title bar in javafx
body: <p>How to get full size of height on the window pop-up in javafx.
  I have a fxml layout design by sceneBuilder with Height of the pop-up window is 147. when the pop-up show on the pop-up have a title bar of Window.
  my problem how to get full height include the title bar.
  thank everybody for help.</p>