[BUGFIX] RTE wraps p tags around ol/ul in chrome and opera

Releases: master, 6.2
Resolves: #62559
Change-Id: Ib9c0576e82424065e875a73edfa91795c71e841e
Reviewed-on: http://review.typo3.org/33656
Reviewed-by: Stanislas Rolland <typo3@sjbr.ca>
Tested-by: Stanislas Rolland <typo3@sjbr.ca>