Grid don't react proberly on resizing of iframe.
* When using downarrow the window dont scroll then scrolling further down than the bottom line.
* When resizing Columns the scrollbars is getting very compact, so compact that you cannot scroll with them. Only clicking arrow uo/down on them.
* Grid dont 'refresh' proberly in virtual mode. Only have the grid are filled until you make a few uparrows, downarrows.