event_registration_mass_mailing

Purpose

Enables event managers to send selected attendee registrations directly into mass mailing lists from the event registration list view.

Features

event.registration: Adds an 'Add to mailing list' action on the attendee list so organizers can push selected registrations into a wizard.
event.registration.mail.list.wizard: Presents a modal to choose the destination mailing list before processing the selected registrations.
mass_mailing: Creates mailing list contacts from the chosen registrations while omitting emails that are already present in the list.