Instead of using the "allocated" state ranges of xdg_shell, lets just use our own gtk_shell by adding a state enum and a configure event. https://bugzilla.gnome.org/show_bug.cgi?id=769936
Let the gtk_shell extension unit handle its own state. https://bugzilla.gnome.org/show_bug.cgi?id=769936
https://bugzilla.gnome.org/show_bug.cgi?id=769936