Use message_count_label component

For the button on the check page, we need to be able to say ‘1 text message’ or
‘55 emails’. We already have the logic to do this on the dashboard (101 text
messages sent), and it’s already in a component. So this commit makes the check
page use the same component.

app/templates/views/check.html

@@ -7,6 +7,7 @@
 {% from "components/file-upload.html" import file_upload %}
 {% from "components/page-footer.html" import page_footer %}
 {% from "components/list.html" import formatted_list %}
+{% from "components/message-count-label.html" import message_count_label %}
 
 {% block page_title %}
   {{ page_heading if errors else "Check and confirm" }} – GOV.UK Notify
@@ -175,7 +176,7 @@
     <form method="post" enctype="multipart/form-data" action="{{url_for('main.start_job', service_id=current_service.id, upload_id=upload_id)}}" class='page-footer'>
       <input type="hidden" name="csrf_token" value="{{ csrf_token() }}" />
       <input type="hidden" name="help" value="{{ '3' if request.args['help'] == '2' else 0 }}" />
-      <input type="submit" class="button" value="{{ send_button_text }}" />
+      <input type="submit" class="button" value="Send {{ count_of_recipients }} {{ message_count_label(count_of_recipients, template.template_type, suffix='') }}" />
       <a href="{{ back_link }}" class="page-footer-back-link">Back</a>
     </form>
   {% endif %}