if an error occurs while using the setup wizard, undo any actions that have succeeded

[bboynton97]

[bboynton97]

Still looking for a successful implementation of this. i do think it'd be a beneficial feature

[bboynton97]

@tcdent is this handled in #235? I'll review that soon, but if so we can close this issue

[tcdent]

Wizard create a template internally and runs init on it all at once, so as long as init is bug free, the user is safe.

I had thought about this being more relevant when running individual commands.