Support saving metadata updates to older versions in book versions branch
@John.kopanas cc @bela @sidorelauku @vignesh03
Current behaviour on book versions branch
Metadata updates to the usually-editable fields for the cover, Book source type, and grants cannot be saved on older book versions metadata.
Expected behaviour
Make the usually-editable wholebook metadata fields (for the cover, Book source type, and grants) editable values in all versions (i.e. make sure the updates can be saved).