- Bugfix: stopped the menu system from generating empty lists (<ul></ul>). Patch

  by Nick (CodeMonkeyX).

- Bugfix: anonymous users could not change comment settings.  Patch by Bart.

- Bugfix: the comment control form always showed "order by date - newest first",
  no matter what order you selected.  Patch by Bart.

- Small usability improvement: only display comment controls when there are
  comments to show.  Patch by Bart.