ui: moved subnode layouting from GraphView to GraphController

This change moves nested layouting of the Graph to GraphController. The DummyNodes get the correct size assigned, as
well as a visible flag. Mouse interaction with the Graph is now handled via the GraphController, which makes it
easier to undo them or reuse the changed state after graph updates.

src/lib/utility/messaging/type/MessageGraphNodeExpand.h

@@ -0,0 +1,26 @@
+#ifndef MESSAGE_GRAPH_NODE_EXPAND_H
+#define MESSAGE_GRAPH_NODE_EXPAND_H
+
+#include "utility/messaging/Message.h"
+#include "utility/types.h"
+#include "data/graph/token_component/TokenComponentAccess.h"
+
+class MessageGraphNodeExpand: public Message<MessageGraphNodeExpand>
+{
+public:
+	MessageGraphNodeExpand(Id tokenId, TokenComponentAccess::AccessType access)
+		: tokenId(tokenId)
+		, access(access)
+	{
+	}
+
+	static const std::string getStaticType()
+	{
+		return "MessageGraphNodeExpand";
+	}
+
+	const Id tokenId;
+	const TokenComponentAccess::AccessType access;
+};
+
+#endif // MESSAGE_GRAPH_NODE_EXPAND_H

src/lib/utility/messaging/type/MessageGraphNodeMove.h

@@ -0,0 +1,26 @@
+#ifndef MESSAGE_GRAPH_NODE_MOVE_H
+#define MESSAGE_GRAPH_NODE_MOVE_H
+
+#include "utility/math/Vector2.h"
+#include "utility/messaging/Message.h"
+#include "utility/types.h"
+
+class MessageGraphNodeMove: public Message<MessageGraphNodeMove>
+{
+public:
+	MessageGraphNodeMove(Id tokenId, Vec2i position)
+		: tokenId(tokenId)
+		, position(position)
+	{
+	}
+
+	static const std::string getStaticType()
+	{
+		return "MessageGraphNodeMove";
+	}
+
+	const Id tokenId;
+	const Vec2i position;
+};
+
+#endif // MESSAGE_GRAPH_NODE_MOVE_H