Hide some components rather than unmounting (#2271)

Hide some components rather than unmounting them to allow to show again
quickly and keep the view state such as the scrolled offset.

app/assets/javascripts/components/features/ui/containers/status_list_container.jsx

@@ -40,6 +40,8 @@ const makeMapStateToProps = () => {
   const getStatusIds = makeGetStatusIds();
 
   const mapStateToProps = (state, props) => ({
+    scrollKey: props.scrollKey,
+    shouldUpdateScroll: props.shouldUpdateScroll,
     statusIds: getStatusIds(state, props),
     isLoading: state.getIn(['timelines', props.type, 'isLoading'], true),
     isUnread: state.getIn(['timelines', props.type, 'unread']) > 0,