[pygtk] ImageMenuItem with disappearing image

[Jeffrey Barish]

I have an ImageMenuItem with check mark (gtk.STOCK_APPLY) as the image.  I
want the visibility of the image to toggle everytime I select the item.  I
am doing that now by controlling the visibility property of the image
(menuitem.props.image.props.visible).  That technique works, but the space
occupied by the image when it is visible is still present when it is not. 
I haven't been able to figure out a way to make that space vanish.  I
suspect that I have to resize either the ImageMenuItem or the parent Menu. 
I have played with the set_resize_mode and resize_children methods of
gtk.Container without success.  The only technique I have found that works
is to set the image to None to make it disappear and then recreate it to
make it reappear.  Surely there is a better way.  Suggestions?
-- 
Jeffrey Barish