Update Form Publisher so that it complies with GDPR from 25th May 2018

Update the email address disclosure when "sharing" generated documents so that the email field is set to "bcc" by default when there is more than one recipient. This ensures compliance with the new GDPR and will secure privacy of personal data as now required by EU Law. Irrespective of how many votes that this idea collects, this modification request should be a PRIORITY to ensure that customers are not compromised by the failure of software to guarantee privacy as required by law.