Fix handling of Web calendars

- handle Web calendars that require authentication;
- properly save the "reload on login" option;
- reload Web calendars when clicking on the reload button on top of the
  events/tasks list;
- properly activate the checkbox of new calendars (as they are enabled
  by default).

Fixes #3326

SoObjects/Appointments/SOGoWebAppointmentFolder.m

@@ -206,8 +206,7 @@ size_t curl_body_function(void *ptr, size_t size, size_t nmemb, void *buffer)
 
 - (BOOL) reloadOnLogin
 {
-  return [[self folderPropertyValueInCategory: @"AutoReloadedWebCalendars"]
-           boolValue];
+  return [[self folderPropertyValueInCategory: @"AutoReloadedWebCalendars"] boolValue];
 }
 
 - (NSException *) delete