private void AddFavorite_Clicked(object sender, EventArgs e)
 {
     _addFavorite = new AddFavorite(null);
     Navigation.PushModalAsync(_addFavorite);
 }
 private async void ShowEditModalPage(FavoriteReadModel Favorite)
 {
     _addFavorite = new AddFavorite(Favorite);
     await Navigation.PushModalAsync(_addFavorite);
 }