* Extended FailureMechanismContributionItem with ability to have a failure mechanism to be always relevant. * FailureMechanismContribution makes 'other' failure mechanism catagory to be 'always relevant'. * FailureMechanismContributionView takes into account FailureMechanismContributionItem instances with IsAlwaysRelevant flag true by making the "algemeen filter' cell for that failure mechanism readonly. * Removed empty test class. Related to Issue [WTI-428] git-svn-id: https://repos.deltares.nl/repos/WettelijkToetsInstrumentarium/trunk@3011 5a3db67b-de53-47b5-99c8-a1c30a6650e2