TS-102: Menu: improved CSS classes handling (rel. TS-61, TS-63)
TS-101: menu/nav: support for #fragment anchor link

The extra condition is due to how Neos renders these links: even if empty section argument is provided, it always render links with #. The extra condition resolves this.

Rel. TS-102, TS-61, TS-63
TS-103: Sub Nav (live)

SideNav/SubNav live share the same template (easier, less DRY).