ui: GraphView can set active tokenId on node clicked

By now the graph displays the active node, without neighbours or anything, and clicking a node sets the active token id to the clicked nodes id.

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src/lib/component/controller/GraphController.h

@@ -1,18 +1,24 @@
 #ifndef GRAPH_CONTROLLER_H
 #define GRAPH_CONTROLLER_H
 
+#include "utility/messaging/MessageListener.h"
+#include "utility/messaging/type/MessageActivateToken.h"
+
 #include "component/controller/Controller.h"
 
 class GraphView;
 class GraphAccess;
 
-class GraphController: public Controller
+class GraphController:
+	public Controller,
+	public MessageListener<MessageActivateToken>
 {
 public:
 	GraphController(std::shared_ptr<GraphAccess> graphAccess);
 	~GraphController();
 
 private:
+	virtual void handleMessage(MessageActivateToken* message);
 	GraphView* getView();
 
 	std::shared_ptr<GraphAccess> m_graphAccess;