fix class names in popover live examples in docs
fix class names in popover live examples in docs

BS3 commits: 43b7a942bc4eb2307353dcf32e7c245664546afc

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