message: Draw the screen when Refresh event arrives
  cc
diff: @@ -159,6 +159,7 @@ impl<N: Notify> Processor<N> {
  glutin::Event::MouseWheel(scroll_delta, touch_phase) => {
  processor.on_mouse_wheel(scroll_delta, touch_phase);
  },
  + glutin::Event::Refresh |
  glutin::Event::Awakened => {
  processor.ctx.terminal.dirty = true;
  },
  