CC-2425:Tweak phone home

- privacy check box is uncheck by defalut
- 'Yes' button is disabled on popup form by default
- custom error msg is added for privacy checkbox on preference
form
- promote form is hidden by default

airtime_mvc/public/js/airtime/preferences/preferences.js

@@ -53,6 +53,14 @@ $(document).ready(function() {
     		pub.removeAttr("disabled");
     	}
 	});
+    
+    $("#Publicise").live('click', function(){
+        if($(this).is(':checked')){
+            $("#public-info").show();
+        }else{
+            $("#public-info").hide();
+        }
+    });
 
     showErrorSections();