DocPopup: call gtk.Container.propagate_expose() on the child
DocPopup: call gtk.Container.propagate_expose() on the child

Since we no longer implement do_forall(), we have to propagate
exposes to the scrollbar ourselves.

https://bugzilla.gnome.org/show_bug.cgi?id=659985

alexey4petrov/reinteract,alexey4petrov/reinteract,alexey4petrov/reinteract