gtk-demo: Don't use deprecated constructor for Gtk.Label
gtk-demo: Don't use deprecated constructor for Gtk.Label

sfeltman/pygobject,GNOME/pygobject,sfeltman/pygobject,sfeltman/pygobject,pexip/pygobject,pexip/pygobject,GNOME/pygobject,GNOME/pygobject,pexip/pygobject