Limit block type semantic token modifier inheritance to BodySchema

[radeksimko]

Background

Currently we let the block type modifiers be inherited indefinitely to any nested blocks within.

I am not sure whether that's what people want, but it's not something I originally intended in my initial PR.

This currently results in all nested blocks to have applied the same style as the root one:

Proposal

Avoid inheritance for DependentBody body schemas.