GUI -- Added theme listeners, so the instance panel can update the instances on a theme change.

Change-Id: If26d5a6ce9fadc02c7184c5ad4d252fc168300a8
diff --git a/web/gui/src/test/_karma/ev/migrate/ev_8_addInstance_B.json b/web/gui/src/test/_karma/ev/migrate/ev_8_addInstance_B.json
new file mode 100644
index 0000000..4313116
--- /dev/null
+++ b/web/gui/src/test/_karma/ev/migrate/ev_8_addInstance_B.json
@@ -0,0 +1,14 @@
+{
+  "event": "addInstance",
+  "payload": {
+    "id": "instB",
+    "ip": "123.22.33.241",
+    "online": true,
+    "uiAttached": false,
+    "switches": 14,
+    "labels": [
+      "instB",
+      "123.22.33.241"
+    ]
+  }
+}