[TASK] RTE: Migrate toolbar text item to plain JavaScript

Releases: master
Resolves: #63941
Change-Id: I84e1c3ffd6448d1e69e46d1aac22d88f95a29d82
Reviewed-on: http://review.typo3.org/35526
Reviewed-by: Stanislas Rolland <typo3@sjbr.ca>
Tested-by: Stanislas Rolland <typo3@sjbr.ca>