Fix EZP-23316: AdvancedObjectRelationList: content not saved

Link: https://jira.ez.no/browse/EZP-23316

## Description
Since #1003 there is the regression when using ```AdvancedObjectRelationList``` the ```else``` statement added then would avoid the ```AdvancedObjectRelationList``` code to be executed.

## Tests
Manual test with and without ```AdvancedObjectRelationList``` enabled