Improve error handling

Change-Id: I1f54cf9cd4770d6602f70036cf0e27c9ede8c893
diff --git a/templates/not_found.html.ep b/templates/not_found.html.ep
index 953ab43..8410580 100644
--- a/templates/not_found.html.ep
+++ b/templates/not_found.html.ep
@@ -1,6 +1,6 @@
 % my $msg = stash('msg') // loc('notFound');
 % layout 'main', title => 'KorAP: ' . loc('notFound');
 
-<p id="no-results"><%= $msg %></p>
+<p class="no-results"><%= $msg %></p>
 
 % notify('warn' => $msg);