Admin/page/main-layout/navigation.html

some tuning (incorporated David's suggestions)

<p>
&nbsp;
<center>
<a href="index.html"><img src="dist/{ISABELLE}/lib/logo/isabelle.gif" width="100" height="86" alt="[Isabelle logo]" border="0"></a>
</center>
<p>
&nbsp;
<p>
<!-- _GP_ setnavcolor("#F0F0F0") -->
<!-- _GP_ page("Home", "index") -->
<!-- _GP_ empty_line(3) -->
<!-- _GP_ page("Isabelle?", "about") -->
<!-- _GP_ empty_line(3) -->
<!-- _GP_ page("Documentation", "docs") -->
<!-- _GP_ empty_line(3) -->
<!-- _GP_ page("Download", "dist/index") -->
<!-- _GP_ empty_line(3) -->
<!-- _GP_ empty_line(3) -->
&nbsp;