Fix left sidebar overlap when scroll on long menu
Fix left sidebar overlap when scroll on long menu

Signed-off-by: Dmitriy Zaporozhets <be23d75b156792e5acab51b196a2deb155d35d6a@gmail.com>

LUMC/gitlabhq,allysonbarros/gitlabhq,icedwater/gitlabhq,daiyu/gitlab-zh,dplarson/gitlabhq,SVArago/gitlabhq,openwide-java/gitlabhq,iiet/iiet-git,screenpages/gitlabhq,daiyu/gitlab-zh,darkrasid/gitlabhq,Soullivaneuh/gitlabhq,htve/GitlabForChinese,icedwater/gitlabhq,dplarson/gitlabhq,mr-dxdy/gitlabhq,martijnvermaat/gitlabhq,jirutka/gitlabhq,iiet/iiet-git,LUMC/gitlabhq,mmkassem/gitlabhq,mr-dxdy/gitlabhq,icedwater/gitlabhq,mmkassem/gitlabhq,stoplightio/gitlabhq,SVArago/gitlabhq,axilleas/gitlabhq,darkrasid/gitlabhq,dplarson/gitlabhq,allysonbarros/gitlabhq,SVArago/gitlabhq,shinexiao/gitlabhq,dplarson/gitlabhq,htve/GitlabForChinese,LUMC/gitlabhq,openwide-java/gitlabhq,t-zuehlsdorff/gitlabhq,daiyu/gitlab-zh,allysonbarros/gitlabhq,martijnvermaat/gitlabhq,t-zuehlsdorff/gitlabhq,SVArago/gitlabhq,larryli/gitlabhq,mmkassem/gitlabhq,daiyu/gitlab-zh,htve/GitlabForChinese,Soullivaneuh/gitlabhq,htve/GitlabForChinese,larryli/gitlabhq,openwide-java/gitlabhq,larryli/gitlabhq,iiet/iiet-git,axilleas/gitlabhq,Soullivaneuh/gitlabhq,t-zuehlsdorff/gitlabhq,screenpages/gitlabhq,stoplightio/gitlabhq,axilleas/gitlabhq,t-zuehlsdorff/gitlabhq,jirutka/gitlabhq,mmkassem/gitlabhq,martijnvermaat/gitlabhq,shinexiao/gitlabhq,icedwater/gitlabhq,dreampet/gitlab,dreampet/gitlab,screenpages/gitlabhq,darkrasid/gitlabhq,LUMC/gitlabhq,screenpages/gitlabhq,mr-dxdy/gitlabhq,stoplightio/gitlabhq,Soullivaneuh/gitlabhq,openwide-java/gitlabhq,dreampet/gitlab,jirutka/gitlabhq,mr-dxdy/gitlabhq,martijnvermaat/gitlabhq,stoplightio/gitlabhq,darkrasid/gitlabhq,iiet/iiet-git,axilleas/gitlabhq,jirutka/gitlabhq,larryli/gitlabhq,shinexiao/gitlabhq,shinexiao/gitlabhq,dreampet/gitlab,allysonbarros/gitlabhq