location: Only show menu when geolocation is in use

Users can now toggle geolocation off/on from privacy panel of
gnome-control-center so we don't need to clutter the menu with a
settings that most users won't touch most of the time.

https://bugzilla.gnome.org/show_bug.cgi?id=731122

js/ui/status/location.js

@@ -96,10 +96,12 @@ const Indicator = new Lang.Class({
     _syncIndicator: function() {
         if (this._proxy == null) {
             this._indicator.visible = false;
+            this._item.actor.visible = false;
             return;
         }
 
         this._indicator.visible = this._proxy.InUse;
+        this._item.actor.visible = this._indicator.visible;
         this._updateMenuLabels();
     },