fix the url's and make the topnav bar stop jumping around when changing the width

Docker-DCO-1.1-Signed-off-by: Sven Dowideit <SvenDowideit@fosiki.com> (github: SvenDowideit)
Merge pull request #5024 from SvenDowideit/md-topnav

fix the url's and make the topnav bar stop jumping around when changing the width