GUI -- [ONOS-324] - making hosts invisible by default.
 - press the 'H' key to toggle host visibility.
 - minor update to 'simple' scenario events.
 - cleanup of alert usage.

Change-Id: I531417720e6b98e795c53729b0c30775b88f8fc1
diff --git a/web/gui/src/main/webapp/json/ev/simple/ev_2_onos.json b/web/gui/src/main/webapp/json/ev/simple/ev_2_onos.json
index d12e194..2df409a 100644
--- a/web/gui/src/main/webapp/json/ev/simple/ev_2_onos.json
+++ b/web/gui/src/main/webapp/json/ev/simple/ev_2_onos.json
@@ -4,16 +4,19 @@
     "id": "of:0000ffffffff0003",
     "type": "switch",
     "online": false,
-    "labels": [
-      "0000ffffffff0003",
-      "FF:FF:FF:FF:00:03",
-      "sw-3",
-      ""
-    ],
     "location": {
       "type": "latlng",
       "lat": 40.7127,
       "lng": -74.0059
+    },
+    "labels": [
+      "",
+      "sw-3",
+      "0000ffffffff0003"
+    ],
+    "metaUi": {
+      "x": 800,
+      "y": 280
     }
   }
 }