Hmm, maybe try resetting your browser cache. Browser might be caching that widget's .tpl file and won't see the updated class.
working now thanks mate
Hi.. im trying to us HTML5 stick to keep the sidebar always visible.. but seems like the css 'position: stick' is not working out of the box... any dirty trick to make it happend ?
Take a look here https://community.nodebb.org/topic/10794/sticky-sidebar-widgets