[Glitch] Fix scroll to top in single column UI

Port 2dee293c4c to glitch-soc

Signed-off-by: Thibaut Girka <thib@sitedethib.com>

app/javascript/flavours/glitch/features/reblogs/index.js

@@ -71,6 +71,7 @@ class Reblogs extends ImmutablePureComponent {
           title={intl.formatMessage(messages.heading)}
           onClick={this.handleHeaderClick}
           showBackButton
+          multiColumn={multiColumn}
         />
 
         <ScrollableList