Minor cleanup in Scatter3DPlot
Minor cleanup in Scatter3DPlot

vascotenner/holoviews,basnijholt/holoviews,ioam/holoviews,ioam/holoviews,ioam/holoviews,basnijholt/holoviews,vascotenner/holoviews,vascotenner/holoviews,basnijholt/holoviews