Moved StructureIdEqualityComparer to separate file, since it was defined twice. Can be moved to *Ringtoets.Common.* if used by other structures Extended tests of TestStructure Related to Issue [WTI-1175]
Clear calculation output and show dialog only when relevant. When importing when: - Structure is set - Output is set When updating: - Structure is set - Output is set - The structure set is removed (not updated) Related to Issue [WTI-1175]