private void Button_Szczegoly(object sender, RoutedEventArgs e)
        {
            WindowKierowca window = new WindowKierowca(false, id);

            window.Show();
        }
        private void Button_DodajKierowce(object sender, RoutedEventArgs e)
        {
            WindowKierowca window = new WindowKierowca(true);

            window.Show();
        }