Add more assettypes to the project.

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

def prj_add_atype(self, *args, **kwargs):
        """Add more assettypes to the project.

        :returns: None
        :rtype: None
        :raises: None
        """
        if not self.cur_prj:
            return
        dialog = AtypeAdderDialog(project=self.cur_prj)
        dialog.exec_()
        atypes = dialog.atypes
        for atype in atypes:
            atypedata = djitemdata.AtypeItemData(atype)
            treemodel.TreeItem(atypedata, self.prj_atype_model.root)