Comment 40 for bug 933776

At the time of this change it seemed to be specially done in scale.cpp. May have been around the time the l. click on icon was changed to current output only, was quite some time ago.
As seen in the attached file which reverts & for better or worse (better here), allows bindings for both current & all to work
(also allows the use of window group from all outputs though not directly thru the scale plugin, that's a different issue since natty