Browser window resize issue

Hi,
I am using SmartGwt-4.0p.

I have a issue with browser window resize. please find below scenario to reproduce.

1)I have layout which will fits to the browser window.
2)Open any SmartGWT window From That layout
3)Resize the browser window. hence scroll bar is coming
4) Move right end to the scroll bar. As a result white spacing is coming right end of the layout.

Please suggest me any property need to set to avoid this.