title: JavaFX how to remove the borders from button
body: <p><a href="https://i.stack.imgur.com/Y76Fl.png" rel="nofollow noreferrer">https://i.stack.imgur.com/Y76Fl.png</a></p>
  
  <p>On this picture on left side - running java program, and right side - Scene builder layout.</p>
  
  <p>This is my github code: <a href="https://github.com/captsmile/calc" rel="nofollow noreferrer">https://github.com/captsmile/calc</a></p>