* Introduced CalculationGroup for hydro boundary calculations on StabilityStoneCover * Tree node info implemented for CalculationGroup ** Marked TODO's for later issue to resolve (related to calculations that go inside the CalculationGroup) Related to Issue [WTI-720] git-svn-id: https://repos.deltares.nl/repos/WettelijkToetsInstrumentarium/trunk@4965 5a3db67b-de53-47b5-99c8-a1c30a6650e2