Upgrade Collector Groups ability to add or remove Collectors

In the Auto Updates for Collectors, when you set a schedule there is no way to go back and edit the Collectors in that schedule without having to delete the schedule and re-add it again with the new Collectors.  Please give us the ability to add or remove Collectors from an Automatic Collector Upgrade Group within the Selected Collectors area.  This would make administration much easier than having to delete and create every time I need to add or remove a Collector from an Auto Upgrade.