2.3 Move from screen [2] to [3]

saved_emotions_list.dart

class _ViewModel {
  final Store<EmotionAppState> store;
  const _ViewModel({this.store});
  static _ViewModel fromStore(Store<EmotionAppState> store) {
    return _ViewModel(store: store);
  }
  void addEmotionDescription(String emotionType, String emotionDescription) {
    store.dispatch(NavigateToAction.push('/add-emotion', preNavigation: () {
      //...
    }));
  }
}