ONOS-5831 - retro fit icon and link scale from topo2

Change-Id: Iaa94929d324ba51e5a3056eb3a59d29be6d3d775
diff --git a/web/gui/src/main/webapp/app/view/topo/topo.js b/web/gui/src/main/webapp/app/view/topo/topo.js
index 0623478..8acebcc 100644
--- a/web/gui/src/main/webapp/app/view/topo/topo.js
+++ b/web/gui/src/main/webapp/app/view/topo/topo.js
@@ -262,6 +262,8 @@
 
         // keep the map lines constant width while zooming
         mapG.style('stroke-width', (2.0 / sc) + 'px');
+
+        tfs.setNodeScale(sc);
     }
 
     function setUpZoom() {