Fix bootstrap 3 grid demo at mobile issue.
Fix bootstrap 3 grid demo at mobile issue.

shahadatnb/Shuffle,amyash/Shuffle,praneybehl/Shuffle,mjrev/Shuffle,praneybehl/Shuffle,mjrev/Shuffle,kkkometo/Shuffle,Vestride/Shuffle,shahadatnb/Shuffle,kkkometo/Shuffle,amyash/Shuffle,Vestride/Shuffle