The method needs to find an included item anyway so rather than iterating
the entire model and checking the included status of each entry iterate
over the contents gtk.TreeFilter.
(Bitbake rev: 79bdd501075ff5164a8ee673a6a2a0e402978ae5)
Signed-off-by: Joshua Lock <josh@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>