Comment 11 for bug 971240

I've have found the problem, I think (at least my patch work).
Do to the re-parenting, the menu is not really detected, I think it is done when the menu is attach to the window, but if we re-parent only the top container, the sub container menu, is not detected.

So I remove the menu from the toplevel container, add add it just after.

This patch contains also the empty window problem, and one compile warning fixed (deprecated function used).