Uninstall agent when deleted from cloud

Deleting a computer from the cloud interface should leave a tiny db entry behind so that if that agent checks in again, it will be given an self-uninstall command. This helps clean up stray computers that are offline for long periods of time.

I’d love to see this. Among other things, when we offboard clients, we have a limited window to get our tools off of them. We can kick off uninstall deployments, but if machines don’t check in during that window but come online after we’ve deleted the tenant they turn into zombies that have to be “identified”, then tagged for the uninstall deployment, and then cleaned up again.