Enabling UI Refresh on change the right list

if the selection of the right list is changed, the left and middle list is now refreshing the UI state.

lib/flutter_datetime_picker.dart

@@ -412,8 +412,12 @@ class _DatePickerState extends State<_DatePickerComponent> {
                     rightScrollCtrl,
                     widget.pickerModel.layoutProportions()[2], (index) {
                     widget.pickerModel.setRightIndex(index);
-                    _notifyDateChanged();
-                  }, null)
+                  }, (index) {
+                    setState(() {
+                      refreshScrollOffset();
+                      _notifyDateChanged();
+                    });
+                  })
                 : null,
           ),
         ],