fix 10767; current .img-thumbnail is equivalent to old .img-polaroid
fix 10767; current .img-thumbnail is equivalent to old .img-polaroid

BS3 commits: 29935e4e26df6768e8bd710dbd33a3c5fb757153

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