Render email title in stats through two columns

[PREMIUM-146]

assets/css/src/generic/_grid.scss

@@ -54,3 +54,7 @@
   column-gap: $grid-gap;
   columns: 2 auto;
 }
+
+.mailpoet-grid-span-two-columns {
+  grid-column: span 2;
+}

assets/js/src/newsletters/campaign_stats/newsletter_stats_info.tsx

@@ -16,7 +16,7 @@ export const NewsletterStatsInfo = ({
   const newsletterDate = newsletter.queue.scheduled_at || newsletter.queue.created_at;
   return (
     <Grid.ThreeColumns className="mailpoet-stats-info">
-      <div>
+      <div className="mailpoet-grid-span-two-columns">
         <Heading level={1}>{newsletter.subject}</Heading>
         <div>
           <b>
@@ -33,7 +33,6 @@ export const NewsletterStatsInfo = ({
           </div>
         )}
       </div>
-      <div />
       <div className="mailpoet-stats-info-sender-preview">
         <div>
           {newsletter.sender_address && (