fixing offcanvas example for chrome
fixing offcanvas example for chrome

BS3 commits: 143427b8ae8c9a2b513c34a2656228ff7347bb3b

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