Added an example of a control option. (home-assistant#1635)

Carlo Costanzo · Landrash · commit 2aac86dae7f1 · 2016-12-21T07:03:42.000+01:00
Inclusion of hiding control option of groups.
diff --git a/source/_components/group.markdown b/source/_components/group.markdown
@@ -74,6 +74,7 @@ Notice in the example below that in order to refer to the group "Living Room", y
 ```yaml
 # Example configuration.yaml entry that shows two groups, referred to in a view group (tab)
   Living Room:
+    control: hidden
     entities:
       - light.light_family_1
       - binary_sensor.motion_living
