Removed override of drawing nodes in TreeView. Removed TreeNodeGraphicExtensions that became obsolete. Implemented automatic construction of an ImageList in the TreeView. Related to Issue [WTI-184] git-svn-id: https://repos.deltares.nl/repos/WettelijkToetsInstrumentarium/trunk@1892 5a3db67b-de53-47b5-99c8-a1c30a6650e2