Bug fix: Drag threshold was prevent drag events when zoomed in
JIRA Tasks; ONOS-6261

Change-Id: I4165649404562054b5ae38b7c0c4e818c2b9dd66
diff --git a/web/gui/src/main/webapp/app/view/topo2/topo2Layout.js b/web/gui/src/main/webapp/app/view/topo2/topo2Layout.js
index c5e8251..97fac88 100644
--- a/web/gui/src/main/webapp/app/view/topo2/topo2Layout.js
+++ b/web/gui/src/main/webapp/app/view/topo2/topo2Layout.js
@@ -145,7 +145,8 @@
                             function () {}, // click event is no longer handled in the drag service
                             this.atDragEnd,
                             this.dragEnabled.bind(this),
-                            clickEnabled
+                            clickEnabled,
+                            t2zs
                         );
 
                         this.update();