Comment 2 for bug 702044

Ok so I totally misread your bug report. I apologize for that. :-)

What you want can be done now, by yourself. You just have to create a new launcher with the following command:

dbus-send --session --print-reply --dest=org.freedesktop.compiz /org/freedesktop/compiz/widget/allscreens/toggle_key org.freedesktop.compiz.activate string:"root" int32:`xwininfo -root|grep id:|awk '{ print $4 }'`

This will toggle the widget layer. Then you can assign a name/icon however you want for the launcher.