void Add_Clicked(object sender, System.EventArgs e)
        {
            var rop = new PopPage(1);

            rop.AddClicked += Rop_AddClicked1;
            PopupNavigation.Instance.PushAsync(rop);
        }
        void Handle_ItemSelected(object sender, Xamarin.Forms.SelectedItemChangedEventArgs e)
        {
            var rece = (Recipe)e.SelectedItem;
            var rop  = new PopPage(2, rece);

            rop.UpdateClciked += Rop_UpdateClciked;
            PopupNavigation.Instance.PushAsync(rop);
        }