make it clearer than <input> buttons are slightly broken on Firefox
make it clearer than <input> buttons are slightly broken on Firefox

BS3 commit dfd10efd80ab56004cb34156b713e8ee7bffb075

2947721120/googlebt4,todc/todc-bootstrap,todc/todc-bootstrap,todc/todc-bootstrap,up2vs/todc-bootstrap,ztx1491/todc-bootstrap,2947721120/todc-bootstrap,aaroncnhk/todc-bootstrap,mozillo/todc-bootstrap