Remove other references to ‘upload recipients’

For consistency.

app/templates/views/send.html

@@ -1,15 +1,18 @@
 {% extends "withnav_template.html" %}
 {% from "components/page-footer.html" import page_footer %}
 {% from "components/file-upload.html" import file_upload %}
+{% from "components/message-count-label.html" import recipient_count_label %}
 {% from "components/table.html" import list_table, text_field, index_field, index_field_heading %}
 
 {% block service_page_title %}
-  Upload recipients
+  Upload a list of {{ recipient_count_label(999, template.template_type) }}
 {% endblock %}
 
 {% block maincolumn_content %}
 
-  <h1 class="heading-large">Upload recipients</h1>
+  <h1 class="heading-large">
+    Upload a list of {{ recipient_count_label(999, template.template_type) }}
+  </h1>
 
   <div class="page-footer bottom-gutter">
     {{file_upload(

app/templates/views/templates/_template.html

@@ -18,7 +18,7 @@
           {% if current_user.has_permissions('send_messages', restrict_admin_usage=True) %}
             <div class="column-half">
               <a href="{{ url_for(".send_messages", service_id=current_service.id, template_id=template.id) }}" class="pill-separate-item">
-                Upload recipients
+                Upload a list of addresses
               </a>
             </div>
             <div class="column-half">