ENHANCEMENT: make MailingList extensible by add $this->extend("updateCMSFields", $fields);
ENHANCEMENT: make MailingList extensible by add $this->extend("updateCMSFields", $fields);

silverstripe-labs/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,guru-digital/silverstripe-newsletter