GUI - Added 'No devices are connected' text.
- commented out test key bindings

Change-Id: I918d683df601d4575574d13b0a5379b34a3f681b
diff --git a/web/gui/src/main/webapp/topo.css b/web/gui/src/main/webapp/topo.css
index bc1bdd0..bd3d7e8 100644
--- a/web/gui/src/main/webapp/topo.css
+++ b/web/gui/src/main/webapp/topo.css
@@ -43,6 +43,20 @@
 }
 
 
+#topo svg .noDevsLayer {
+    visibility: hidden;
+}
+
+#topo svg .noDevsLayer text {
+    font-size: 60pt;
+    font-style: italic;
+    fill: #dde;
+}
+
+#topo svg .noDevsBird {
+    fill: #ecd;
+}
+
 /* NODES */
 
 #topo svg .node {