T1002191 enable new wizard elements

I found a way to auto enable new wizard entries. Together with #748 this solves the last known problem of the new wizard.

They get only enabled once (the first time an IDE with the new wizards is started) and then never again.
Do you also log failure somewhere? Seems rather uninformative (though I agree it might have been useful for debugging). I'm a bit worried about having logging very early on, as I've seen deadlocks recently involving the logger (when configured with Sdtout redirect to console).