Add help option named sonata_admin_help to sub-fields that are non admin fields. Example given with sonata_type_immutable_array.
Rename sonata_admin_help option to sonata_admin
Merge pull request #2400 from PHDA/help_form

Add help option named sonata_admin_help to sub-fields that are non admin fields. Example given with sonata_type_immutable_array.