Dashboard: Prevent two menus to be open at the same time

Hi,

I would like to automatically "close" any dashboard menu when another menu is opened. I think that could help to lighten the WP dashboard which can sometimes become a bit confusing.

Example:

1) User is browsing themes ("Appearance" menu is opened)
2) User clicks on the "Pages" menu
3) "Appearance" menu gets automatically closed.

Any idea how to achieve that in a "clean" way?

Laurent