R&D centre - icons need to be scrolled

[Leopard]

Hopefully minor one, but irritating

in the R&D centre when you look at an upgrade node there is a little block of icons to the right showing the parts, so far so good, however since these icons are all the same size would it be possible to pinch a few pixels vertically to show two full rows, so when there are six icons or less there is no scrolling - currently the bottom of the second row exceeds the window and triggers the scroll bar.