[TASK] Adjust implementation of relation editing following Vidi change

Change-Id: I25c07673bc31fd4ffb0baed8234c0ddad5a52657
Releases: 3.0
Resolves: #59428
Reviewed-on: https://review.typo3.org/30635
Reviewed-by: Fabien Udriot
Tested-by: Fabien Udriot