logic: Refactored graph node sorting

* Fixed sorting to always be alphabetical within each bucket
* Bundled nodes will expand in place
* Overview bundles are not sorted alphabetical
* Probably improved sorting performance by using std::set

src/lib/component/controller/GraphController.h

@@ -93,7 +93,8 @@ private:
 	void addExpandToggleNode(DummyNode* node) const;
 	void layoutToGrid(DummyNode* node) const;
 
-	void layoutGraph(bool sort = false);
+	void layoutGraph(bool getSortedNodes = false);
+	void assignBundleIds();
 
 	DummyNode* getDummyGraphNodeById(Id tokenId) const;