data: fixes and improvements

* save forward declarations of classes and structs as NODE_UNDEFINED_TYPE
* put whole files on top in snippet sorting
* uses aggregation count as weight in graph layouting instead of adding all edges to graph
* refreshing all views of components on MessageRefresh in ComponentManager
* reloading ApplikatinoSettings on MessageRefresh

src/lib/component/controller/helper/DummyEdge.h

@@ -3,6 +3,9 @@
 
 #include "utility/types.h"
 
+#include "data/graph/Edge.h"
+#include "data/graph/token_component/TokenComponentAggregation.h"
+
 class Edge;
 
 // temporary data structure for (visual) graph creation process
@@ -17,6 +20,16 @@ struct DummyEdge
 	{
 	}
 
+	int getWeight() const
+	{
+		if (data->isType(Edge::EDGE_AGGREGATION))
+		{
+			return data->getComponent<TokenComponentAggregation>()->getAggregationCount();
+		}
+
+		return 1;
+	}
+
 	Id ownerId;
 	Id targetId;