Move background-size property out of media query
Move background-size property out of media query

Fixes #1103.

git/git-scm.com,mosoft521/gitscm-next,Mokolea/git-scm.com,mosoft521/gitscm-next,git/git-scm.com,jasonlong/git-scm.com,jasonlong/git-scm.com,jasonlong/git-scm.com,Mokolea/git-scm.com,Mokolea/git-scm.com,Mokolea/git-scm.com,mosoft521/gitscm-next,jasonlong/git-scm.com,git/git-scm.com,mosoft521/gitscm-next,git/git-scm.com