Automatically grant access to an area based on IDP group membership

[RakanHowls]

In general, everyone who belongs to the Constore (or a subteam thereof) or Dealer's Den Department requires the sponsordesk area permission.
The same is true for the registration department and the regdesk area. (In addition, I imagine some subteam of the security department might need it...)

Therefore it might be nice to somehow specify that every member of an IDP group has permission on a set of areas in the regsys.