Renamed ReadResult to PipingReadResult to be more consistent with other class names. Added PipingCalculationInputSelectionEditor which provides a base implementation for dropdown selection editors for piping input. Made PipingCalculationInputsSoilProfileSelectionEditor and PipingCalculationInputsSurfaceLineSelectionEditor inherit from this base class. Added tests. Related to Issue [WTI-27] git-svn-id: https://repos.deltares.nl/repos/WettelijkToetsInstrumentarium/trunk@627 5a3db67b-de53-47b5-99c8-a1c30a6650e2