hgweb: don't show summary link as active on error pages in monoblue
These two error pages in monoblue think they are the summary page, when they
clearly aren't.
{header}
<title>{repo|escape}: Branches</title>
<link rel="alternate" type="application/atom+xml" href="{url|urlescape}atom-log" title="Atom feed for {repo|escape}"/>
<link rel="alternate" type="application/rss+xml" href="{url|urlescape}rss-log" title="RSS feed for {repo|escape}"/>
</head>
<body>
<div id="container">
<div class="page-header">
<h1 class="breadcrumb"><a href="/">Mercurial</a> {pathdef%breadcrumb} / help</h1>
<form action="{url|urlescape}log">
{sessionvars%hiddenformentry}
<dl class="search">
<dt><label>Search: </label></dt>
<dd><input type="text" name="rev" /></dd>
</dl>
</form>
<ul class="page-nav">
<li><a href="{url|urlescape}summary{sessionvars%urlparameter}">summary</a></li>
<li><a href="{url|urlescape}shortlog{sessionvars%urlparameter}">shortlog</a></li>
<li><a href="{url|urlescape}changelog{sessionvars%urlparameter}">changelog</a></li>
<li><a href="{url|urlescape}graph{sessionvars%urlparameter}">graph</a></li>
<li><a href="{url|urlescape}tags{sessionvars%urlparameter}">tags</a></li>
<li><a href="{url|urlescape}bookmarks{sessionvars%urlparameter}">bookmarks</a></li>
<li><a href="{url|urlescape}help{sessionvars%urlparameter}">branches</a></li>
<li><a href="{url|urlescape}file{sessionvars%urlparameter}">files</a></li>
<li class="current">help</li>
</ul>
</div>
<h2 class="no-link no-border">branches</h2>
<table cellspacing="0">
<tr><td colspan="2"><h2><a name="main" href="#topics">Topics</a></h2></td></tr>
{topics % helpentry}
<tr><td colspan="2"><h2><a name="main" href="#main">Main Commands</a></h2></td></tr>
{earlycommands % helpentry}
<tr><td colspan="2"><h2><a name="other" href="#other">Other Commands</a></h2></td></tr>
{othercommands % helpentry}
</table>
{footer}