preset_box.pack_end (bypass_button, false, false, 10);
preset_box.pack_end (save_button, false, false);
preset_box.pack_end (combo, false, false);
preset_box.pack_end (bypass_button, false, false, 10);
preset_box.pack_end (save_button, false, false);
preset_box.pack_end (combo, false, false);