Expandable row content scroll issue using mousewheel

I am using Expandable grid feature of Ui-grid, in expended row I do not have other grid where as I have my own component which is showing some text data or may be it's a form.

The expended row content is very long so I put a fixed height div and enable to scrolling of div. Now if I expand the row and use mousewheel to scroll the expended row content, it does not scroll the expended row content where as it scroll the main grid row, so I am not able to see all content of expanded row.

Here is plunker link http://plnkr.co/edit/dGJu6NlfCyfCMXIunA7S?p=preview