This works well, thank you!
I have a problem in IE9 though. It seems only to reproduce when I embed the Grid with the DropDownList in an IFRAME:
The DropDownLists in my Grid still appear even after I collapse the Grouping in the Grid. Also, if I turn on virtualized scolling in IE, the DropDownLists hang steady even when I scroll down.
Chrome works fine.
Any idea what's going on here?