Sign up for shifts via account-based groups

It would be great if we could bulk sign-up an entire group for a shift. I know you can do this for number-based groups, but we have a lot of committees that go to particular events and it would be nice if we didn't have to sign them up on by one, especially when they're all already organized in a group. If Roster Mode had the option to assign based on account-based group we would really get a lot out of that