REF: segment_graymatter: changed default vertfile for PAM50_levels instead because PAM50_levels_continuous is not included in warp_template
REF: segment_graymatter: changed default vertfile for PAM50_levels instead because PAM50_levels_continuous is not included in warp_template

3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox