Backport scss changes for ee 7973
Backport scss changes for ee 7973

https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/7973

axilleas/gitlabhq,stoplightio/gitlabhq,mmkassem/gitlabhq,mmkassem/gitlabhq,stoplightio/gitlabhq,axilleas/gitlabhq,axilleas/gitlabhq,stoplightio/gitlabhq,dreampet/gitlab,mmkassem/gitlabhq,dreampet/gitlab,iiet/iiet-git,dreampet/gitlab,stoplightio/gitlabhq,iiet/iiet-git,iiet/iiet-git,axilleas/gitlabhq,iiet/iiet-git,mmkassem/gitlabhq,dreampet/gitlab