UX design for revealing contacts to a private group
This action is not available to the creator of the group. This ticket includes the UX for notifying the user that she has contacts in the group, both when she first joins and when any of her contacts subsequently join. The design may include an indication of how many contacts the user syncs the group with (connection strength), which may overlap with #645 and #646 (closed). The design may involve onboarding.
Subtask of #127 (closed).