Network: Center on previous size.

src/View/Network/GraphWidget.py

@@ -475,7 +475,7 @@ class GraphWidget(QGraphicsView):
     def setup_scene(self, min_size, max_size, size):
         scene = QGraphicsScene(self)
         scene.setItemIndexMethod(QGraphicsScene.NoIndex)
-        scene.setSceneRect(0, 0, 2000, 2000)
+        scene.setSceneRect(0, 0, 6000, 6000)
 
         self.setScene(scene)
         self.setCacheMode(QGraphicsView.CacheBackground)
@@ -486,6 +486,7 @@ class GraphWidget(QGraphicsView):
 
         self.scale(1, 1)
         self.previousScale = 1
+        self.centerOn(1000.0, 1000.0)
 
         if min_size:
             self.setMinimumSize(*min_size)