support also the wired version of CadMouse Pro
currently, there is a simple autodetection: we enumerate HID devices and look for the wireless version, if not found, we look for the wired version
<!DOCTYPE node PUBLIC "-//freedesktop//DTD D-BUS Object Introspection 1.0//EN" "http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd">
<node>
<interface name="org.freedesktop.UPower">
<method name="EnumerateDevices">
<annotation name="org.freedesktop.DBus.GLib.Async" value=""/>
<arg type="ao" name="devices" direction="out"/>
</method>
</interface>
<interface name="org.freedesktop.UPower.Device">
<property type="d" name="Percentage" access="read"/>
</interface>
</node>