SmartGuard option: "Delay if VM is running"

For some users, running SmartGuard snapshots in the middle of a session can be disruptive. It would be great if there were an option to "Delay if VM is running" which ensures that SmartGuard snapshots are only taken while the guest is hibernated, suspended, or stopped.

If this results in a failure to create a snapshot for a full day, then Parallels could present a pop up similar to the "Notify me before snapshot creation" dialog.