Reduce all uses of Unstructured to the simpler form, and avoid asking
for mapper or typer unless it is required. Use Typed() for places that
previously used VersionedObject, and remove paths for versioned objects
from code that is now using unstructured.
Change the name of the flag to something slightly more user-friendly,
while making it default true. The flag is kept so that someone can
revert it temporarly if things go wrong.
