Warn user when deploying an unsaved VDB - avoid scary errors

I have, on occasion, tried to deploy a VDB before I'd saved it. In doing so, the server spews forth exceptions and the Designer indicates:
Problem deploying VDB (and in this case it wasn't even the one I was trying to deploy!) The Designer's error is attached. So is the server log excerpt.

If the Designer were to politely point out the VDB is in a dirty state, it might save someone some headache. (The dialog could have one of those check boxes to prevent it from popping up again.)