fix: Introduce one hole for each label boundary before joining surfaces; fix triangulation of divider
fix: Introduce one hole for each label boundary before joining surfaces; fix triangulation of divider

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