Hi Magdalena,
I've fixed the jumping by removing
from my grid.
However, I also have an issue with my custom delete popup. If you take a look at the updated Dojo: http://dojo.telerik.com/UJiXa/3,
please open it in full screen mode, and scroll down to the bottom and delete the bottom entry. The page will jump to the top, and then it will cut off some of the popup because it is not fully scrolled to the bottom. Is there a way to prevent the page from jumping to the top?