SortNormalizer don't work from "Configure Sort" in ListGrid

Hello,

when I define a SortNormalizer for a field in a ListGrid, the SortNormalizer isn't called, when I configure the sort with the "Configure Sort" dialog from the header menu.

You can reproduce it with "Data-Aware Sort" example.

1. Sort by Area (km²)
2. Open the "Configure Sort" dialog
3. Change the Sort by to GDP (percapita)
4. Apply

The sorting difference form the sort when using the header field directly.

We use Version v9.1p_2014-11-16 (2014-11-16).

Best Regards

Peter