Display the correct header

[MAILPOET-2142]

assets/js/src/newsletters/send/congratulate/success.jsx

@@ -57,8 +57,8 @@ MSSUserSuccess.propTypes = {
 
 function PitchMss() {
   return (
-    <div>
-      DISPLAY MSS PITCH HERE
+    <div className="mailpoet_congratulate_success">
+      <h1>{MailPoet.I18n.t('congratulationsMSSPitchHeader')}</h1>
     </div>
   );
 }

views/newsletters.html

@@ -349,6 +349,7 @@
     'congratulationsSendFailHeader': __('Oops! We can’t send your newsletter 😕'),
     'congratulationsSendFailExplain': __('Rest assured, this is fairly common and is usually fixed quickly. [link]See our quick guide[/link] to help you solve this and get your website sending.'),
     'congratulationsLoadingHeader': __('Congrats, you’re sending your first newsletter! We’re doing a quick verification to make sure everything works fine.'),
+    'congratulationsMSSPitchHeader': __('Your email has been sent'),
 
     'reviewRequestHeading': _x('Thank you! Time to tell the world?', 'After a user gives us positive feedback via the NPS poll, we ask them to review our plugin on WordPress.org.'),
     'reviewRequestDidYouKnow': __('[username], did you know that hundreds of WordPress users read the reviews on the plugin repository? They’re also a source of inspiration for our team.'),