Project View Folder Grouping in OSX.

On windows, your folders in the project view will be grouped first alphabetically followed by sibling files grouped alphabetically. However, in OSX, no such distinction is made, giving one long alphabetically sorted list. Is it at all possible to enable the windows-style behaviour in OSX? (Ideally for the Unity 4.x series)

Please, I don't want to get into a discussion about "switchers" being unwilling to just accept OSX as it is and making it more like windows, but if anyone knows a way (whether this involves patching OSX at the kernel level, installing a a prefs pane or even a unity-specific fix), I would be very grateful. Thanks!