sel_name = gtk_label_new (NULL);
gtk_box_pack_start (GTK_BOX (w), sel_name, TRUE, TRUE, 0);
+ gtk_app_chooser_button_set_heading (GTK_APP_CHOOSER_BUTTON (combobox), "Choose one, <i>not</i> two");
gtk_app_chooser_button_append_separator (GTK_APP_CHOOSER_BUTTON (combobox));
gtk_app_chooser_button_append_custom_item (GTK_APP_CHOOSER_BUTTON (combobox),
CUSTOM_ITEM,