message: fix volume streaming with custom props enabled
diff: @@ -276,7 +276,9 @@ export namespace VolumeStreaming {
  const parent = this.plugin.helpers.substructureParent.get(loci.structure);
  if (!parent) return Box3D.empty();
  const root = this.getStructureRoot();
  - if (!root || !root.obj || root.obj !== parent.obj) return Box3D.empty();
  + if (!root || !root.obj) return Box3D.empty();
  + const rootParent = this.plugin.helpers.substructureParent.get(root.obj.data);
  + if (parent !== rootParent) return Box3D.empty();
  const extendedLoci = StructureElement.Loci.extendToWholeResidues(loci)
  const box = StructureElement.Loci.getBoundary(extendedLoci).box
  