The split was not clear between property-type and type-or-title,
so it was not obvious which partial should be called for recursion.
That resulted in an error where type-or-title was only called for objects and array items, even if it also resolves
arrays of types.
This makes the split clearer. property-type must be called for any schema,
and object-type-or-title is only called for object schemas.
Signed-off-by: Kévin Commaille <zecakeh@tedomum.fr>
