Navigation Pane And Mouse Wheel

When I click on an item inthe navigation pane and want to scroll down to a certain folder in the main window, the mouse wheel stays on the nav pane. Have to go and click in the main window to scroll.

If you click the navigation pane, then the wheel should in my opinion default over to scroll on the main pane. It's a little bothersome to have to keep clikckingto scroll after i just cliked to open that item in the navitgation pane already.

confused yet? maybe the pic will better describe it. I know it's not a big deal, but......

Like in the pic i clicked on music folder in the left nav pane, i would want it to scroll over on right without having to click mouse again. Maybe it's a matter of preference, but that's mine.