logic: only show edges connected to active node

* split active and visible setting for DummyNodes
* set and check visible on DummyEdges
* include fix for Mac in MatrixDynamicBase
* fix for disappearing style and crashes in GraphView
* cleaned up DummyNode

fortune cookie message = Du stehst kurz davor etwas Neues zu unternehmen.

src/app/qt/view/QtGraphView.cpp

@@ -1,7 +1,5 @@
 #include "QtGraphView.h"
 
-#include <iostream>
-
 #include <QBoxLayout>
 #include <QFrame>
 #include <QGraphicsScene>
@@ -153,8 +151,6 @@ void QtGraphView::doRebuildGraph(
 			node->hoverEnter();
 		}
 	}
-
-	m_graph = graph;
 }
 
 void QtGraphView::doClear()
@@ -233,6 +229,11 @@ std::shared_ptr<QtGraphNode> QtGraphView::createNodeRecursive(
 
 std::shared_ptr<QtGraphEdge> QtGraphView::createEdge(QGraphicsView* view, const DummyEdge& edge)
 {
+	if (!edge.visible)
+	{
+		return NULL;
+	}
+
 	std::shared_ptr<QtGraphNode> owner = findNodeRecursive(m_nodes, edge.ownerId);
 	std::shared_ptr<QtGraphNode> target = findNodeRecursive(m_nodes, edge.targetId);