Include 'background-size' both outside and inside media query
Include 'background-size' both outside and inside media query

Fixes #1103.

Including the 'background-size' property twice is not exactly DRY but it
is required here as otherwise the 'background' shorthand property will
reset the 'background-size' to auto.

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