private void TruncateMenuItem_Click(object sender, EventArgs e)
        {
            if (TasView.AnyRowsSelected)
            {
                var rollbackFrame   = TasView.LastSelectedIndex.Value;
                var needsToRollback = TasView.FirstSelectedIndex < Emulator.Frame;

                CurrentTasMovie.Truncate(rollbackFrame);
                MarkerControl.MarkerInputRoll.TruncateSelection(CurrentTasMovie.Markers.Count - 1);

                if (needsToRollback)
                {
                    GoToFrame(rollbackFrame);
                }
                else
                {
                    RefreshDialog();
                }
            }
        }