Fixed bug where the correct object (hydraulic boundary locations collection) was not notified after clearing the hydraulic boundary location results due to a change in the grass cover erosion outwards failure mechanism. Related to Issue [WTI-971] git-svn-id: https://repos.deltares.nl/repos/WettelijkToetsInstrumentarium/trunk@7647 5a3db67b-de53-47b5-99c8-a1c30a6650e2