logic: combined GraphAccess and LocationAccess to StorageAccess

Having only one access point to the Storage will simplify caching and parallelisation in the future. Also the two
accesses were never really independent of each other anyways, because in some cases they had to access both data sets.

src/lib/component/controller/GraphController.h

@@ -16,8 +16,8 @@
 struct DummyNode;
 struct DummyEdge;
 class Graph;
-class GraphAccess;
 class Node;
+class StorageAccess;
 
 class GraphController
 	: public Controller
@@ -44,7 +44,7 @@ public:
 		float charWidth;
 	};
 
-	GraphController(GraphAccess* graphAccess);
+	GraphController(StorageAccess* storageAccess);
 	~GraphController();
 
 private:
@@ -74,7 +74,7 @@ private:
 	DummyNode* findDummyNodeRecursive(std::vector<DummyNode>& nodes, Id tokenId);
 	DummyNode* findDummyNodeAccessRecursive(std::vector<DummyNode>& nodes, Id parentId, TokenComponentAccess::AccessType type);
 
-	GraphAccess* m_graphAccess;
+	StorageAccess* m_storageAccess;
 	GraphView::Metrics m_viewMetrics;
 
 	std::vector<DummyNode> m_dummyNodes;