fixed a couple of bugs in connected components filter tested on a couple of phantom images ignore axis feature working
fixed a couple of bugs in connected components filter
tested on a couple of phantom images
ignore axis feature working

MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3