/// <summary>
/// Delete model from scene
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnDeleteModelFromScene_Click(object sender, RoutedEventArgs e)
{
myScene.DeleteElement((string)lvScene.SelectedItem);
lvScene.ItemsSource = myScene.Names;
lvScene.Items.Refresh();
btnDeleteModelFromScene.IsEnabled = false;
}