message: feat(aio): expand nav menu branch of select item on page load
diff: @@ -17,6 +17,7 @@ export class NavItemComponent implements OnChanges {
  ngOnChanges(changes: SimpleChanges) {
  if (changes['selectedNodes'] || changes['node']) {
  this.isSelected = this.selectedNodes.indexOf(this.node) !== -1;
  + this.isExpanded = this.isExpanded || this.isSelected;
  }
  this.setClasses();
  }
  