Core: initialize IsoValueProperty with zero isovalues unless otherwise specified
Core: initialize IsoValueProperty with zero isovalues unless otherwise specified

Sparkier/inviwo,Sparkier/inviwo,Sparkier/inviwo,inviwo/inviwo,inviwo/inviwo,inviwo/inviwo,inviwo/inviwo,inviwo/inviwo,Sparkier/inviwo,Sparkier/inviwo,inviwo/inviwo