Optimized embedded tutorial for mobile

Change-Id: I0b345c75cbd68bd1f1205a313ddbb7ecd94b58c3
diff --git a/templates/doc/ql/regexp.html.ep b/templates/doc/ql/regexp.html.ep
index efbd41d..c92b158 100644
--- a/templates/doc/ql/regexp.html.ep
+++ b/templates/doc/ql/regexp.html.ep
@@ -1,5 +1,5 @@
 % layout 'main', title => 'KorAP: Regular Expressions';
 
-<h2>Regular Expressions</h2>
+<h2 id="tutorial-top">Regular Expressions</h2>
 
 %= doc_uc