bugfix: genomics_xml validate_params always returned arrayref (so evaluated to true) even when empty; changed new_user.tt group_label to group_name for case-insensitivity of 'guest' user; field name change for genomics
patched histology blocks worklist to hide non-block/slide sample types; 1 new & 1 renamed field for genomics, returned additional_samples to SpecimensBlood for legacy ppm xml validation