private void GameHistoryTree_OnSelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e)
{
var roundPartial = ((TreeView)sender).SelectedItem as RoundPartialHistory;
if (roundPartial != null && !ViewModel.IsGameInProgress)
{
ViewModel.IsArenaMessageVisible = false;
ViewModel.Game.SetPreview(roundPartial.BoardState);
}
}