private void btnStartPlayoffsTop8_Click(object sender, RoutedEventArgs e)
{
if (this.tournament.Rounds == null ||
this.tournament.Rounds.Count == 0) return;
this.BusyIndicator.IsBusy = true;
this.tournament.CreatePlayoffsDoubleElimination(DoubleEliminationPlayoffRound.Top8);
this.ctrlPlayoffs8.DataContext = null;
this.ctrlPlayoffs8.DataContext = this.tournament.Playoffs8;
this.BusyIndicator.IsBusy = false;
}