OK, so apparently certain parts of the control center system look for
GTK-2 themes in share/gnome/themes, and certain parts don't. But they
all look for the themes in share/themes. Except for the metacity theme
selector, which only looks in share/gnome/themes and not in share/themes.
So, install metacity themes into share/gnome/themes, and install GTK-2
themes into share/themes.
As an extra special bonus, now the Lush metacity theme doesn't work. It
appears to be referencing a whole bunch of images that aren't included in
the gnome-themes-extras distfiles. Something further to look forward to
in the next PORTVERSION.
Reported by: Rui Lopes <email@example.com>
Reviewed by: Rui Lopes