* Move etc/xdg/xdg-xubuntu/xfce4/xfconf/…/xfce4-panel.xml to etc/xdg/xdg-xubuntu/xfce4/panel/default.xml: this is the correct place to store the default settings, and avoid any weird issue when removing a panel. lp: #747137 * Handle the move in the maintainer scripts as well.