[BUGFIX] IRRE handle useCombination correctly

There are currently some errors when using useCombination:
1.) Fatal error when adding a record via foreign_selector
2.) Missing data from useCombination
3.) Opening records via ajax missing data or
fails completely due to record not being found

This change fixes those.

Change-Id: I4a9ca3646de88427a2f2e6f175e278df795785d0
Resolves: #71488
Releases: master
Reviewed-on: https://review.typo3.org/44686


Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Mathias Schreiber <mathias.schreiber@wmdb.de>
Tested-by: Mathias Schreiber <mathias.schreiber@wmdb.de>