Add status message to confirm that roles have been updated

This is really a lovely module. I use it to allow members of a site to modify only their own roles and it's the only module I know of that allows this and works with multiple roles (as long as 'access profiles' is disabled, of course).

Please consider adding a status message that confirms that the roles have been updated. This goes in line 128.

drupal_set_message(t('Roles have been updated.'));