(name 'OB-TreeView-jk.1' message 'Adds new classes
 - OBTreeHolder: keeps all OBFan instances necessary for expanded tree view
 - OBTreePosition: keeps selection as an array
 - OBTreeEdgeNavigation: represents tree navigation

Introduce new messages in OBColumn, OBFan, OBList, OBMetaEdge, OBPosition as a tree view extension.' id '49f9f2d1-3367-4880-98a3-0278f97a249a' date '8 April 2008' time '1:37:23 am' author 'jk' ancestors () stepChildren ())