src: converted NodeType to a class

NodeType internally still uses the Type enum

src/lib/component/controller/UndoRedoController.cpp

@@ -615,7 +615,7 @@ SearchMatch UndoRedoController::getSearchMatchForMessage(MessageBase* message) c
 			SearchMatch match;
 			match.name = match.text = "aggregation"; // TODO: show aggregation source and target
 			match.searchType = SearchMatch::SEARCH_TOKEN;
-			match.nodeType = Node::NODE_TYPE;
+			match.nodeType = NodeType::NODE_TYPE;
 			return match;
 		}
 	}