Don't display WhoToFollow panel if empty

Signed-off-by: marcin mikołajczak <git@mkljczk.pl>

app/soapbox/features/ui/components/who-to-follow-panel.tsx

@@ -29,6 +29,10 @@ const WhoToFollowPanel = ({ limit }: IWhoToFollowPanel) => {
     dismissSuggestion.mutate(account.id);
   };
 
+  if (!isFetching && !suggestions.length) {
+    return null;
+  }
+
   return (
     <Widget
       title={<FormattedMessage id='who_to_follow.title' defaultMessage='People To Follow' />}