https://mail.gnome.org/archives/gtk-list/2008-February/msg00091.html
GtkRecentChooserMenu gtk_widget_show_all() misbehaviour
show allgtkwidgetmisbehaviour
https://manpages.ubuntu.com/manpages/xenial/man3/Gtk2::RecentChooserMenu.3pm.html
Ubuntu Manpage: Gtk2::RecentChooserMenu - wrapper for GtkRecentChooserMenu
wrapper for GtkRecentChooserMenu
ubuntumanpagewrapper