BZ-1074015: improved messaging when deleting dataobjects that are still referenced within the data model.
(cherry-picked from 69d1dea)
Translation adjustment related to fix for BZ-1074015.
(cherry-picked from f683714)
BZ-1074015: additional commit in order to not consider object self-references when evaluating if they can be deleted.
(cherry-picked from e8e8141)