Network: Change selected reach color and minor change.

src/View/Network/GraphWidget.py

@@ -178,12 +178,15 @@ class EdgeItem(QGraphicsItem):
         if self.graph.selected_item() == self:
             color = Qt.red
         elif self.graph.current_edge() == self:
-            color = Qt.black
+            color = Qt.blue
         elif not self.graph.graph.is_enable_edge(self.edge):
             color = Qt.darkGray
 
-        painter.setPen(QPen(color, 2, Qt.SolidLine, Qt.RoundCap,
-                            Qt.RoundJoin))
+        painter.setPen(
+            QPen(
+                color, 2, Qt.SolidLine, Qt.RoundCap, Qt.RoundJoin
+            )
+        )
         # Draw the line
         painter.drawLine(line)