Re-enable zero touch UI

@ikeough me and @kronz discussed re-enabling this with an experimental marker.

It does work well within limitations, and we could use the extra testing to find a collection of places where it doesn't work.

The people who will use it are the most likely to be problem tolerant. I'd like it on for next week.

On the other hand, fixing the known issues is currently scheduled for 072.

What do you think?