[BUGFIX] CKEditor: Configuration properties not translatable

Adding custom stylesSets it is not possible to use "LLL:..." syntax. I
would be just display as is.

Add recursive resolving of "LLL:..." references in the configuration
properties.

Resolves: #80914
Releases: master, 8.7
Change-Id: I5c65f54cc3cc15cc4950df200828b48e124325f3
Reviewed-on: https://review.typo3.org/52516


Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Thorben Nissen <thorben.nissen@kapp-hamburg.de>
Tested-by: Thorben Nissen <thorben.nissen@kapp-hamburg.de>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>