Groups: Add members to a group by Membership Level so we can have multiple membership levels automatically added.

Example 1:
Our membership organization has different levels of Supporting Partners, but they are all Vendors. We track them within the Membership Levels alongside our Members. Would like to have a "Vendor Group" As new vendors come on board or others discontinue sponsorship, they would automatically be added to Vendors simply by virtue of the Memebership Level they belong to--NOT individually added (which is easy to forget to do and difficult manage).

Example 2:
Some of our Membership Levels are Non-Voting. Therefore, it would be helpful to have separate groups for Voting Members and Non-Voting Members, each comprised of the various levels that are allowed/not allowed to vote.