am ba5b20eb: am 1a00f7fe: fix \'next\' links to disable them when at the end of a list. Also remove the "next class" link at the end of training.

* commit 'ba5b20eb9f1714193780518aa1ac2ac8087fb3b7':
  fix 'next' links to disable them when at the end of a list. Also remove the "next class" link at the end of training.