message: mol-state: sync root node transform version
diff: @@ -520,7 +520,10 @@ async function updateNode(ctx: UpdateContext, currentRef: Ref): Promise<UpdateNo
  const transform = current.transform;
  // special case for Root
  - if (current.transform.ref === Transform.RootRef) return { action: 'none' };
  + if (current.transform.ref === Transform.RootRef) {
  + current.version = transform.version;
  + return { action: 'none' };
  + }
  const parentCell = StateSelection.findAncestorOfType(tree, ctx.cells, currentRef, transform.transformer.definition.from);
  if (!parentCell) {
  @@ -560,6 +563,7 @@ async function updateNode(ctx: UpdateContext, currentRef: Ref): Promise<UpdateNo
  current.version = transform.version;
  return { ref: currentRef, action: 'updated', obj: current.obj! };
  default:
  + current.version = transform.version;
  return { action: 'none' };
  }
  }
  