XFCE 4.8

Hi all,

It's more than time.

I'd like to update XFCE to 4.8, replacing all xfce related packages in
pkgsrc with the ones from -wip.
I've been using it for a few weeks now, as is iMil
(see http://imil.net/gfx/shoot-NetBSD-xfce-4.8.png)

My plan is to do the update somewhere next week, unless anyone
objects.
Then, I'll start working on xfce 4.10 that was just released
a couple days ago.

Feedback more than welcome, be it on usability or packaging.

Thanks,

Guillaume.