fixes 9985: update grid classes in grid example
fixes 9985: update grid classes in grid example

BS3 commits: c8c3bf00b6f7e8f765ae9c51eb0d8b4498c34d02

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