Resets the combo box to the original "selected" value from the
        constructor (or the first value if no selected value was specified).

def select_default(self):
        """
        Resets the combo box to the original "selected" value from the
        constructor (or the first value if no selected value was specified).
        """
        if self._default is None:
            if not self._set_option_by_index(0):
                utils.error_format(self.description + "\n" +
                "Unable to select default option as the Combo is empty")

        else:
            if not self._set_option(self._default):
                utils.error_format( self.description + "\n" +
                "Unable to select default option as it doesnt exist in the Combo")