enh: Add smooth-image -mask option [Applications]
enh: Add smooth-image -mask option [Applications]

schuhschuh/MIRTK,schuhschuh/MIRTK,BioMedIA/MIRTK,schuhschuh/MIRTK,BioMedIA/MIRTK,schuhschuh/MIRTK,BioMedIA/MIRTK,BioMedIA/MIRTK