[TASK] Form elements being numerated and hidden elements are visible

Form elements being numerated because browsers numerated <ol> elements by
default

Change-Id: Ia1af699ced49d0e5d44c600b94d80aa93cafc528
Resolves: #72312
Releases: master
Reviewed-on: https://review.typo3.org/45548


Reviewed-by: Morton Jonuschat <m.jonuschat@mojocode.de>
Tested-by: Morton Jonuschat <m.jonuschat@mojocode.de>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>