added option for fslview (fixed issue 1871) (#1883)
added option for fslview (fixed issue 1871) (#1883)



Former-commit-id: b24ef4bcfd72b80d265c2d0aac13416646157b16
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox