ui: Improvements and fixes in graph layouting

* put nodes with bidirectional aggregations on the left
* layout aggregations either horizontal or vertical based on buckets
* exceed bucket height if only one element and vertical split
* fixed hiding nodes in sublayout showed empty spot

src/lib_gui/qt/view/QtGraphView.cpp

@@ -1042,7 +1042,8 @@ QtGraphEdge* QtGraphView::createEdge(
 	if (owner != nullptr && target != nullptr)
 	{
 		QtGraphEdge* qtEdge = new QtGraphEdge(
-			owner, target, edge->data, edge->getWeight(), edge->active && !useBezier, edge->getDirection());
+			owner, target, edge->data, edge->getWeight(), edge->active && !useBezier, edge->layoutHorizontal,
+			edge->getDirection());
 
 		if (trailMode != Graph::TRAIL_NONE)
 		{