Action MailingEventSubscribe will fail silently if the Mailing Group is not a "Public" group.
Action MailingEventSubscribe will fail silently if the Mailing Group is not a "Public" group.
This change will perform a validation on the group selected and raise an error if a non-Public group was selected. Unfortunately, I cannot see anywhere in the UI where the error message is shown to the user. Possibly another improvement!
Fix for #19