GUI -- Implemented "Show Traffic on hover" toggle button in masthead.
 - also included sample *Instance events.

Change-Id: Ibdee2b6c54a0a192361d269dbe69128d44604838
diff --git a/web/gui/src/main/webapp/json/ev/_capture/rx/addInstance_ex1.json b/web/gui/src/main/webapp/json/ev/_capture/rx/addInstance_ex1.json
new file mode 100644
index 0000000..5077182
--- /dev/null
+++ b/web/gui/src/main/webapp/json/ev/_capture/rx/addInstance_ex1.json
@@ -0,0 +1,7 @@
+{
+  "event": "addInstance",
+  "payload": {
+    "id": "onos-1",
+    "online": "true"
+  }
+}