Enabling checkHashCodes on object repetitions to ensure deletes are handled correctly. Without this, if an object is deleted and the object on the row below cannot be deleted, the latter will erroneously be marked as deleteable in the UI, once the deleted object has been removed from the repetition.

Enabling checkHashCodes globally causes attribute repetitions to break.
Merge pull request #493 from fbarthez/ERModern-checkHashCodes

Enabling checkHashCodes on object repetitions in ERModern