private void MenuItem_Click_2(object sender, RoutedEventArgs e)
 {
     Tabele.Tabele t = new Tabele.Tabele("demo", raspored);
     t.ShowDialog();
 }
 private void Ucionice_Click(object sender, RoutedEventArgs e)
 {
     Tabele.Tabele w = new Tabele.Tabele(raspored);
     w.ShowDialog();
 }