Add sender name option to 'if' content

app/templates/views/service-settings/set-inbound-sms.html

@@ -19,6 +19,9 @@
         <p>
           Your service can receive text messages sent to {{ current_service.inbound_number }}.
         </p>
+        <p>
+          You can still send text messages from a sender name if you need to, but users will not be able to reply to those messages.
+        </p>
         <p>
           <a href="{{ url_for('.support') }}">Contact us</a> if you want to switch this feature off.
         </p>