Squashed 'app/' changes from e9fbf0f..1519d0e

1519d0e CSS for non-gov versions of header and footer

git-subtree-dir: app
git-subtree-split: 1519d0e1fb996bc97a205c422623db3e3b65c064
Merge commit '213946593a6ade5fbb5b29a090dd5243f1953070'