[BUGFIX] Correctly apply titleText set in RTE TSconfig

With the changes of the new formEngine the names of forms and
elements must be adjusted to make the Page TSconfig options
RTE.classesAnchor.[id].titleText work again.

Resolves: #75804
Releases: master, 7.6
Change-Id: I92b2c6d0dcb959834db3bb8868beab55b627abac
Reviewed-on: https://review.typo3.org/48693


Tested-by: Bamboo TYPO3com <info@typo3.com>
Reviewed-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Markus Klein <markus.klein@typo3.org>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>