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/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,