Hide ‘Use my email address/phone number link’

This link is useful for people who are setting up templates and want to
test out how they look/how Notify works.

‘Caseworker’ users shouldn’t need to send themselves messages on a
regular basis, so this link is another thing we can take away.

app/main/views/send.py

@@ -436,7 +436,8 @@ def send_test_step(service_id, template_id, step_index):
         request.endpoint == 'main.send_one_off_step' and
         step_index == 0 and
         template.template_type != 'letter' and
-        not (template.template_type == 'sms' and current_user.mobile_number is None)
+        not (template.template_type == 'sms' and current_user.mobile_number is None) and
+        current_user.has_permissions('view_activity')
     ):
         skip_link = (
             'Use my {}'.format(first_column_headings[template.template_type][0]),