add_accelerator(agMain, g_update_button, "clicked", GDK_KEY_u);
add_accelerator(agMain, g_refresh_button, "clicked", GDK_KEY_r);
add_accelerator(agMain, g_update_button, "clicked", GDK_KEY_u);
add_accelerator(agMain, g_refresh_button, "clicked", GDK_KEY_r);