Show a meaningful error message if a user tries to deliver a project with the delivery recipient as a share user. Share users receive download only permission. By definition a delivery recipient must gain project admin permissions when accepting a delivery. These changes also register share users if they are not already registered with DDS.
Show a meaningful error message if a user tries to deliver a project with the delivery recipient as a share user. Share users receive download only permission. By definition a delivery recipient must gain project admin permissions when accepting a delivery. These changes also register share users if they are not already registered with DDS.
Fixes #297 #298