Incorporated comments review 2503: - Cleaned up unused references in Ringtoets.Common - Cleaned up files - Added test in FailureMechanismResultView to assert the behaviour of the recursive observer.WTI-1621
Incorporated comments review 2503: - Cleaned up unused references in ClosingStructures - Rewrote treenodeinfo test to be in line with other comparable tests.WTI-1621