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/favourited_statuses/index.jsx

@@ -47,7 +47,7 @@ class Favourites extends React.PureComponent {
     return (
       <Column icon='star' heading={intl.formatMessage(messages.heading)}>
         <ColumnBackButtonSlim />
-        <StatusList statusIds={statusIds} me={me} onScrollToBottom={this.handleScrollToBottom} />
+        <StatusList {...this.props} onScrollToBottom={this.handleScrollToBottom} />
       </Column>
     );
   }