[FIX] Reimplement CSS menu style details. Todo: FiveAlive and FiveAlive-lite themes/options.

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/13.x@52697 b456876b-0849-0410-b77d-98878d47e9d5
[NEW] Default style details for CSS menus. (Tikiroot/css/cssmenus.css is still loaded separately for menu functions.)

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/13.x@52698 b456876b-0849-0410-b77d-98878d47e9d5