* Covered edge cases where some imported FailureMechanismSections have start or end points too far from referenceline. * Covered edge case where imported file doesn't contain sections. Related to Issue [WTI-365] git-svn-id: https://repos.deltares.nl/repos/WettelijkToetsInstrumentarium/trunk@2354 5a3db67b-de53-47b5-99c8-a1c30a6650e2