Fix backgrid-container style in doc
Fix backgrid-container style in doc

Acquisio/backgrid,aboieriu/backgrid,digideskio/backgrid,qferr/backgrid,kirill-zhirnov/backgrid,kirill-zhirnov/backgrid,goodwall/backgrid,bryce-gibson/backgrid,blackducksoftware/backgrid,getjaco/backgrid,goodwall/backgrid,blackducksoftware/backgrid,jesseditson/backgrid,aboieriu/backgrid,ludoo0d0a/backgrid,jesseditson/backgrid,crealytics/backgrid,wyuenho/backgrid,qferr/backgrid,bryce-gibson/backgrid,digideskio/backgrid,wyuenho/backgrid,ludoo0d0a/backgrid,getjaco/backgrid,Acquisio/backgrid