Merge branch 'release/3.9.1'
Merge branch 'release/4.0.0'
Merge branch 'release/4.0.1'
Fix small issue when re-creating the customer area menu in some cases
Add some important rules for the nvaigation menu (compatibility with TwentyTwelve theme)
Add a class to the body element on customer area pages.
Fix redirect issue occuring sometimes (headers already sent)