Fix 2 docker.com theme regressions on docs.docker.com
- Hover colours of doc nav wrong
- Primary Docs Nav not active when user is Logged in.

Docker-DCO-1.1-Signed-off-by: Sven Dowideit <SvenDowideit@docker.com> (github: SvenDowideit)
Merge pull request #6827 from SvenDowideit/docker-com-theme-regressions

Fix 2 docker.com theme regressions on docs.docker.com