@Override
 public void removeSeries(SeriesHandler series) {
   super.removeSeries(series);
   windowModel.removeSeries(series);
   overviewModel.removeSeries(series);
 }
 @Override
 public void removeSeries(int index) {
   super.removeSeries(index);
   windowModel.removeSeries(index);
   overviewModel.removeSeries(index);
 }