code: private synchronized void removeResultTable(){
  		OWLResultSetTableModel tm = getTableModel();
  		if (tm != null){
  			tm.close();
  		}
  		resultTablePanel.setTableModel(new DefaultTableModel());
  	}
docs: removes the result table.
  Could be called at data query execution, or at cancelling
  Not necessary when replacing with a new result, just to remove old
  results that are outdated