Use bootstrap cards for feedback pages

Change-Id: I811bf2f3ce2992b7110d6742069eb07f38bd5b37
diff --git a/templates/mail_confirmed.htm b/templates/mail_confirmed.htm
index 46e2435..c01da31 100644
--- a/templates/mail_confirmed.htm
+++ b/templates/mail_confirmed.htm
@@ -1 +1,5 @@
-<div class="alert alert-success" role="alert">Your email was confirmed! you are being redirected...</div>
+<div class="alert alert-success" role="alert">
+    <p>Your email address was confirmed! Thank you for registering for
+        <?php echo $SERVICE_ACRONYM; if(!empty($REDIRECT_TO) ) { echo "</p><p>You are being redirected..."; } ?>
+    </p>
+</div>