Attemtps to close the first **Script_Editor_tabWidget** Widget tab Model editor file.

        :return: Method success.
        :rtype: bool

def close_first_file(self):
        """
        Attemtps to close the first **Script_Editor_tabWidget** Widget tab Model editor file.

        :return: Method success.
        :rtype: bool
        """

        editor = self.get_current_editor()
        if len(self.__model.list_editors()) == 1 and editor.is_untitled and not editor.is_modified():
            self.close_file(leave_first_editor=False)
            return True