OPT: msct_image: merged with dev
OPT: msct_image: merged with dev

Former-commit-id: 7fced0f5bf0cff81bc464ac56e6285a5d7b46293
Former-commit-id: 9c19590b15a7f49676731b358b633750fa3fa9e7
3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox