OntologyChangeEvents causing badly behaving listener

OntologyChangeEvents that do not involve proper changes of axioms (e.g. when renaming the ontology IRI) can cause UnsupportedOperationExceptions during the call of method OWLOntologyChange.getAxiom() resulting in incorrectly displayed InputOntologyViews.

Resolution: check with OWLOntologyChange.isAxiomChange() beforehand.