Benni Mack authored Jul 27, 2021 and Christian Kuhn committed Jul 29, 2021

This change uses RelationHandler for foreign_table / allowed and MM
in BackendUtility::getProcessedValue in a consistent way.

In addition, the RelationHandler now fetches the full
record by default and adds this to the processed array, making
fewer queries to the database by fetching each record
fully directly.

Some bugs are fixed with that:
* FAL images (as in all inline fields) in list module now have the correct order
* Fewer DB queries when fetching relations in Group field in FormEngine

Setting the option in RelationHandler to fetch all fields by default
avoids unneeded calls in general when fetching the records.

Resolves: #94651
Releases: master
Change-Id: I8261a0c2657b9b71ae7cdc686ee43eaa7461c8b6
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/70117
Tested-by: core-ci <typo3@b13.com>
Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>