def add_remove_cinnamon_themes(self, widget):
window = Gtk.Window()
box = Gtk.VBox()
window.add(box)
window.set_title(_("Desktop themes"))
window.set_default_size(720, 480)
window.set_border_width(6)
window.set_position(Gtk.WindowPosition.CENTER)
page = ExtensionSidePage(self.name, self.icon, self.keywords, box, "theme", None)
page.load(window=window)
box.pack_start(page.vbox, True, True, 6)
window.show_all()
return True
