Added clear illustration point functionality on hydraulic boundary database level: WTI-1973- Added decorated method to the RiskeerContextMenu builder to allow custom importers to be added.
Added function to clear illustration point results of an AssessmentSection: WTI-1973- Performed as a preparation to clear illustration point results from a wave height or design water level calculation group tree node info.
Introduced change handler for dealing with clearing illustration points. WTI-1973- Implemented change handler in the ContextMenuItemFactory for a generic approach when adding a clear illustration points context menu item.
Added context menu item for design water level collections: WTI-1973- Item added as placeholder to indicate the location for clearing the illustration point items.
