Adding option to show no host labels in the GUI.

Change-Id: I80072b14f15e344fa8a55f40a446085c1538337c
diff --git a/web/gui/src/main/resources/org/onosproject/ui/lion/core/view/Topo.properties b/web/gui/src/main/resources/org/onosproject/ui/lion/core/view/Topo.properties
index b5c5398..8e45d49 100644
--- a/web/gui/src/main/resources/org/onosproject/ui/lion/core/view/Topo.properties
+++ b/web/gui/src/main/resources/org/onosproject/ui/lion/core/view/Topo.properties
@@ -61,6 +61,7 @@
 fl_host_labels_show_friendly=Show friendly host labels
 fl_host_labels_show_ip=Show host IP addresses
 fl_host_labels_show_mac=Show host MAC addresses
+fl_host_labels_hide=Hide host labels
 
 fl_offline_devices=Offline Devices
 fl_bad_links=Bad Links