BUG: now automatically removing any padding option when registering with sliceReg
BUG: now automatically removing any padding option when registering with sliceReg

Former-commit-id: 73eba53e7f483ce51af02a40450fc9318ebdacb6 [formerly b795b935ec241f5004464914b14f651fa8cb6c6a]
Former-commit-id: c85de48d712680cbf0f07e268ba7e5031bd79d0b
Former-commit-id: 9933016845093d41b1bd0d1b47fe592d19362216
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox