Reset the current selections and **reset option** values to default
        for all components
        
        .. Warning:: This method also reset the components options values to
            the defaults values.

def clear_selections(self):
        """ Reset the current selections and **reset option** values to default
        for all components
        
        .. Warning:: This method also reset the components options values to
            the defaults values.
        """
        self._selected = []
        for component in self._components.values():
            if isinstance(component, Optionable):
                self._logger.info("<block: %s> clear selection an options for '%s'" % (self.name, component.name))
                component.clear_options_values()