message: fixup full-screen toogle
diff: @@ -932,10 +932,11 @@ void MainWindow::clearInput() {
  }
  void MainWindow::setFullscreen(bool fs) {
  - dMouse = Point();
  SystemApi::setAsFullscreen(hwnd(),fs);
  - setCursorPosition(w()/2,h()/2);
  + auto rect = SystemApi::windowClientRect(hwnd());
  + setCursorPosition(rect.w/2,rect.h/2);
  setCursorShape(fs ? CursorShape::Hidden : CursorShape::Arrow);
  + dMouse = Point();
  }
  void MainWindow::render(){
  