enh: Add aggregate-image histogram 'mode' output [Applications]
enh: Add aggregate-image histogram 'mode' output [Applications]

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