GUI -- [ONOS-347] -  Suppress display of offline-devices (press the 'M' key).
 - also minor cleanup of link "online" state, based on src/tgt nodes online state.

Change-Id: I6d4c634e4d9f7f994f9871b7c95e3264d6ada2bb
diff --git a/web/gui/src/main/webapp/json/ev/simple/scenario.json b/web/gui/src/main/webapp/json/ev/simple/scenario.json
index 4f2ae60..524377c 100644
--- a/web/gui/src/main/webapp/json/ev/simple/scenario.json
+++ b/web/gui/src/main/webapp/json/ev/simple/scenario.json
@@ -24,6 +24,7 @@
     "10. update link (increase width, update props)",
     "11. update link (reduce width, update props)",
     "12. remove link",
-    "13. remove host (10.0.0.17)"
+    "13. remove host (10.0.0.17)",
+    "13. remove device [3]"
   ]
 }