Replaced nm-device-wired icon in devices with icon in status because of Xfce

In Xfce, the panel defaults to using the icon in the devices folder rather than the icon in the status folder, which results in the displaying of the GNOME (I think?) nm-device-wired icon, which seems to be left over in the devices folders of the respected icon sizes. If this was by design, it does not match the design flow of Numix in Xubuntu and throws off the panel.