message: Fix the fullscreen example
diff: @@ -123,15 +123,12 @@ fn main() {
  // If enter was pressed toggle fullscreen.
  if enter_pressed {
  if fullscreen {
  - let wb = glutin::window::WindowBuilder::new();
  - let cb = glutin::ContextBuilder::new();
  - display.rebuild(wb, cb, &event_loop).unwrap();
  + display.gl_window().window().set_fullscreen(None);
  fullscreen = false;
  } else {
  - let wb = glutin::window::WindowBuilder::new()
  - .with_fullscreen(Some(event_loop.primary_monitor()));
  - let cb = glutin::ContextBuilder::new();
  - display.rebuild(wb, cb, &event_loop).unwrap();
  + let monitor_handle = display.gl_window().window().available_monitors().next().unwrap();
  + display.gl_window().window().set_fullscreen(Some(monitor_handle));
  +
  fullscreen = true;
  }
  }
  