[BUGFIX] Apply potential changes after form editor save operation

[BUGFIX] Apply potential changes after form editor save operation

Apply potential form definition changes within the form editor,
if the form definition changes while saving it.
This is possible through the hook ['ext/form']['beforeFormSave']

Releases: master
Resolves: #84081
Change-Id: I0c20e0d20f9ec9ec8ccc0f279f68f9b4ebdfc306
Reviewed-on: https://review.typo3.org/55958
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Jurian Janssen <jurian.janssen@gmail.com>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Susanne Moog <susanne.moog@typo3.org>
Tested-by: Susanne Moog <susanne.moog@typo3.org>
Reviewed-by: Frank Naegler <frank.naegler@typo3.org>
Tested-by: Frank Naegler <frank.naegler@typo3.org>