[TASK] Further improvements of the form editor/ inspector

The markup of the field definitions has been optimized and aligned
with the standard styling (e.g. in the page properties). Available
info texts have also been adjusted.

Resolves: #95087
Releases: main
Change-Id: I83edbfde382bd03e56fa6c475137e5ee1ed088be
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/73695


Tested-by: core-ci <typo3@b13.com>
Tested-by: Elias Häußler <e.haeussler@familie-redlich.de>
Tested-by: Andreas Steiger <typo3@andreassteiger.de>
Tested-by: Björn Jacob <bjoern.jacob@tritum.de>
Tested-by: waldhacker <hello@waldhacker.dev>
Reviewed-by: Elias Häußler <e.haeussler@familie-redlich.de>
Reviewed-by: Andreas Steiger <typo3@andreassteiger.de>
Reviewed-by: Björn Jacob <bjoern.jacob@tritum.de>
Reviewed-by: waldhacker <hello@waldhacker.dev>