private void StackPanel_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
 {
     VsetkoKatastre.ItemsSource        = AfrikaKataster.Uloha15();
     VsetkoObcaniaKatastra.ItemsSource = AfrikaKataster.VsetkoObyvatelstvo();
     AktivnyPanel(UlohVsetkoPanel);
 }