unHack(addEventSource): not checking for :isVisible when adding and removing event source

Signed-off-by: Josh Kurz <josh.kurz@turner.com>

Author: jkurz

src/calendar.js

@@ -230,10 +230,8 @@ angular.module('ui.calendar', [])
         };
 
         eventSourcesWatcher.onAdded = function(source) {
-          if(elm.is(':visible')){
             scope.calendar.fullCalendar('addEventSource', source);
             sourcesChanged = true;
-          }
         };
 
         eventSourcesWatcher.onRemoved = function(source) {

test/calendar.spec.js

@@ -176,7 +176,8 @@ describe('uiCalendar', function () {
             expect($.fn.fullCalendar.mostRecentCall.args[0].weekends).toEqual(false);
             scope.uiConfig.calendar.weekends = true;
             scope.$apply();
-            expect($.fn.fullCalendar.callCount).toEqual(2);
+            //3 because we are destroying the calendar as well. 
+            expect($.fn.fullCalendar.callCount).toEqual(3);
             expect($.fn.fullCalendar.mostRecentCall.args[0].weekends).toEqual(true);
         });