We currently need 'vzctl exec' for net stats which is clumsy.
And the blkio stats for container does not seem to deliver
correct values.

We now have fully functional openvz vnc console.

And add start/stop/shutdown/remove/console buttons.

test if /etc/pve is mounted; else simple exit

I.e. when vzctl package is not installed.

That code is too unstable, so we disable that for now.

We should implement the fielset option in InputPanel instead (if we really want to use fieldsets)

And disable Floppy option (till now we do not support floppies)