INST: a couple of improvements
INST: a couple of improvements

Former-commit-id: 13aaff3500e4bd953fd3a6b46e1562a38e497f65 [formerly d7d8c8222030447fab1d039778a098df16834749]
Former-commit-id: 2baaa92fe132573519687ec8493b1ba16223a0f1
Former-commit-id: 840286104f78659f40cae201e6745cd55937b531
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox