Ability To Add More Approval Statuses For Reviews

I'm looking for the ability to add different approval statuses for reviews/testimonials similar to that of how you can add more order statuses to the system.  There are already 3 in there by default, but we often touch base with our customers who post reviews and it would help us to have another status added to where we can flag it as "awaiting reply" if we reach out to a customer, etc.