def open_addnew_win(self, *args, **kwargs):
        """Open a new window so the use can choose to add new reftracks

        :returns: None
        :rtype: None
        :raises: NotImplementedError
        """
        if self.reftrackadderwin:
            self.reftrackadderwin.close()
        self.reftrackadderwin = ReftrackAdderWin(self.refobjinter, self.root, parent=self)
        self.reftrackadderwin.destroyed.connect(self.addnewwin_destroyed)
        self.reftrackadderwin.show()
Open a new window so the use can choose to add new reftracks

        :returns: None
        :rtype: None
        :raises: NotImplementedError