Allow a non-admin/non-employee to manage a Member Group

We have a lot of "invite only" events or private Contract Time. In order to hide events from the calendar, we need to not make the event public and utilize "member groups" - so that only specific players can see/register for the event. These invite only/contract time groups can grow/shrink over time and it is a lot of work on the admins/employees of DD to maintain this member group list. It would be nice to designate a specific player in CR to own the member group or allow them to make changes. In our case, we enable a "player ambassador" to organize play - they are the ones that send out the weekly email to their friends and recap play and organize the upcoming games etc. We would like to be able to allow those players to maintain the list of invitees without our staff getting involved.