Change single-column mode to scroll the whole page (#11359)

Fix #10840

app/javascript/mastodon/features/community_timeline/index.js

@@ -126,6 +126,7 @@ class CommunityTimeline extends React.PureComponent {
           onLoadMore={this.handleLoadMore}
           emptyMessage={<FormattedMessage id='empty_column.community' defaultMessage='The local timeline is empty. Write something publicly to get the ball rolling!' />}
           shouldUpdateScroll={shouldUpdateScroll}
+          bindToDocument={!multiColumn}
         />
       </Column>
     );