Design Suite: Enable list selection of Client attendees to add to new Workshop in Workshop Designer

As client attendees are added to workshops in WD, allow them to be selected from a drop down list in new workshops being set up to more quickly add client attendees similar to adding PwC members by email instead of having to enter every client member as a new entity for each workshop. For example if a team has a group of 20 client stakeholders where subsets of those individuals will be attending amongst 40 different workshops, the manual entry / import becomes very tedious