Topo2: Topo2SelectService now maintains de/selecting nodes and displaying the details panel

Change-Id: I29d2476d8615263d79304636df6ca1664e7dc76b
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 4e21040..473bd3a 100644
--- a/web/gui/src/main/webapp/app/view/topo2/topo2Layout.js
+++ b/web/gui/src/main/webapp/app/view/topo2/topo2Layout.js
@@ -158,7 +158,7 @@
                             .data(regionNodes, function (d) { return d.get('id'); });
 
                         this.drag = sus.createDragBehavior(this.force,
-                            t2ss.selectObject,
+                            function () {}, // click event is no longer handled in the drag service
                             this.atDragEnd,
                             this.dragEnabled.bind(this),
                             clickEnabled