ONOS-1819 - GUI -- Group view added (WIP). Enum Cell Formatter created.

Change-Id: I6ade17a1dfd17cf2049bafe654d6411244d4ad07
diff --git a/web/gui/src/main/java/org/onosproject/ui/impl/UiExtensionManager.java b/web/gui/src/main/java/org/onosproject/ui/impl/UiExtensionManager.java
index 92ac04d..a09ae58 100644
--- a/web/gui/src/main/java/org/onosproject/ui/impl/UiExtensionManager.java
+++ b/web/gui/src/main/java/org/onosproject/ui/impl/UiExtensionManager.java
@@ -69,6 +69,7 @@
                 new UiView(NETWORK, "device", "Devices", "nav_devs"),
                 new UiViewHidden("flow"),
                 new UiViewHidden("port"),
+                new UiViewHidden("group"),
                 new UiView(NETWORK, "link", "Links", "nav_links"),
                 new UiView(NETWORK, "host", "Hosts", "nav_hosts"),
                 new UiView(NETWORK, "intent", "Intents", "nav_intents")
@@ -82,6 +83,7 @@
                         new HostViewMessageHandler(),
                         new FlowViewMessageHandler(),
                         new PortViewMessageHandler(),
+                        new GroupViewMessageHandler(),
                         new IntentViewMessageHandler(),
                         new ApplicationViewMessageHandler(),
                         new ClusterViewMessageHandler()