Disable Snapshot action on the VM

[teleyinex]

If a user tries to take a snapshot from the running VM it will crash. Disable it if possible ;)

[teleyinex]

The problem is that when a user clicks the button to take a snapshot, the hypervisor pauses the VM. This is detected as by the wrapper as if the user is cheating, so it resumes it, causing later to fail the snapshot if it is taken.

The only solution for the moment is to remove the menu bar, or change the cheating policy in the wrapper.