Quartz DnD patch review & approval sought

[Paul Davis <paul linuxaudiosystems com>]

http://bugzilla.gnome.org/show_bug.cgi?id=588449

I'd appreciate some more review and possible approval of this patch.
It would remove the last substantive item in the patch that is
necessary to get Ardour to run on GTK/Quartz, and would presumably
help other applications similarly.

--p