APICHANGE: add 'Recipient' as one managed data model to newsletter admin
APICHANGE: add 'Recipient' as one managed data model to newsletter admin
silverstripe-labs/silverstripe-newsletter,guru-digital/silverstripe-newsletter,silverstripe-archive/silverstripe-newsletter,silverstripe-archive/silverstripe-newsletter,silverstripe-labs/silverstripe-newsletter,guru-digital/silverstripe-newsletter,guru-digital/silverstripe-newsletter,silverstripe-labs/silverstripe-newsletter