Clear Sort in ListGrid/TreeGrid

In all your grid examples it seems that Clear Sort menu item (and ListGrid.setSort(null) as well) only removes the sorting icon from the header but does not actually "un-sort" the grid.

However your documentation for ListGrid.clearSort() states: "The internal list of SortSpecifiers is removed and the grid is unsorted"

Example is here
http://www-demos.smartclient.com/iso...implicity#sort

Just remove these lines from code
sortFieldNum: 2,
sortDirection: "descending"

Note the original unsorted state, then sort and Clear Sort - there is no way to roll back to this original state


Is this a bug or by design?

If this is not a bug how can I bring the grid to it's original loaded state when user clicks Clear Sort in header menu?