List<String> reorderList(List<String> old, int oldIndex, int newIndex) {
  List<String> tmp = [...old];

  int newIndexCalc = newIndex - 1;

  if (newIndex < oldIndex) {
    newIndexCalc = newIndex;
  }

  if (newIndex == old.length) {
    newIndexCalc = old.length - 1;
  }

  if (newIndex == 0) {
    newIndexCalc = 0;
  }

  String oldItem = tmp.removeAt(oldIndex);
  tmp.insert(newIndexCalc, oldItem);

  return tmp;
}