[TASK] Unify UL/OL standard

Bring standard styles for UL/OL html elements. Ordered
and unordered lists are styled with disc bullet and decimal.

Also overrides those new standard definition for non
standard "lists" like tabs or trees.

Resolves: #55819
Releases: 6.2
Change-Id: I6f4317d46d503f6d5737015710d19d9c2361b14c
Reviewed-on: https://review.typo3.org/27517
Reviewed-by: Marcin Sągol
Reviewed-by: Georg Ringer
Tested-by: Georg Ringer