message: Fixes NS dropdown showing no NS sometimes.
diff: @@ -202,6 +202,10 @@ export class Dropdown extends DropdownMixin {
  const { items, keyboardHoverKey } = this.state;
  if (key === 'Enter') {
  + if (!keyboardHoverKey) {
  + this.hide(e);
  + return;
  + }
  this.onClick_(keyboardHoverKey, e);
  return;
  }
  