Add flow for sending yourself a text message

This commit adds a shortcut, which (in the background) does the creation and
uploading of a CSV file for you.

This enables users to send themselves a test message without having to fiddle
about with CSV files.

app/templates/views/choose-sms-template.html

@@ -20,8 +20,9 @@
             {{ sms_message(template.formatted_as_markup, name=template.name) }}
           </div>
           <div class="column-one-third">
-            <div class="sms-message-use-link">
-              <a href="{{ url_for(".send_sms", service_id=service_id, template_id=template.id) }}">Use this template</a>
+            <div class="sms-message-use-links">
+              <a href="{{ url_for(".send_sms", service_id=service_id, template_id=template.id) }}">Add recipients</a>
+              <a href="{{ url_for(".send_sms_to_self", service_id=service_id, template_id=template.id) }}">Send yourself a test</a>
             </div>
           </div>
         {% endfor %}

app/templates/views/job.html

@@ -52,7 +52,7 @@
 
     {% call(item) list_table(
       [
-        {'row': 1, 'phone': '+447700 900995', 'template': template['name'], 'status': 'queued'}
+        {'row': 1, 'phone': '+447700 900995', 'template': template['name'], 'status': 'sent'}
       ],
       caption=uploaded_file_name,
       caption_visible=False,

app/templates/views/send-sms.html

@@ -10,7 +10,7 @@
 
 {% block maincolumn_content %}
 
-  <h1 class="heading-large">Send text messages</h1>
+  <h1 class="heading-large">Add recipients</h1>
 
   <form method="POST" enctype="multipart/form-data">