message: improve SelectLoci behavior
  only handle direct children of updated objects (no update of same repr multiple times)
diff: @@ -57,7 +57,7 @@ export const HighlightLoci = PluginBehavior.create({
  if (!this.ctx.canvas3d || this.ctx.isBusy) return;
  const loci = this.getLoci(current.loci);
  - if (this.params.ignore?.indexOf(loci.kind) >= 0) {
  + if (this.params.ignore.includes(loci.kind)) {
  this.ctx.managers.interactivity.lociHighlights.highlightOnly({ repr: current.repr, loci: EmptyLoci });
  return;
  }
  @@ -161,7 +161,7 @@ export const SelectLoci = PluginBehavior.create({
  if (!this.ctx.canvas3d || this.ctx.isBusy || !this.ctx.selectionMode) return;
  const loci = this.getLoci(current.loci);
  - if (this.params.ignore?.indexOf(loci.kind) >= 0) return;
  + if (this.params.ignore.includes(loci.kind)) return;
  // only trigger the 1st action that matches
  for (const [binding, action, condition] of actions) {
  @@ -186,8 +186,12 @@ export const SelectLoci = PluginBehavior.create({
  Structure.areEquivalent(structure, oldStructure) &&
  Structure.areHierarchiesEqual(structure, oldStructure)) return;
  - const reprs = this.ctx.state.data.select(StateSelection.Generators.ofType(SO.Molecule.Structure.Representation3D, ref));
  - for (const repr of reprs) this.applySelectMark(repr.transform.ref, true);
  + const children = this.ctx.state.data.select(StateSelection.children(ref));
  + for (const child of children) {
  + if (child.obj?.type === SO.Molecule.Structure.Representation3D.type) {
  + this.applySelectMark(child.transform.ref, true);
  + }
  + }
  }
  });
  }
  