hgweb: improve shortlog formatting
shorten author with |person
don't shrink font (default font is presumed to be preferred reading size)
set widths based on font ems rather than page percents.
#header#
<title>Mercurial Error</title>
</head>
<body>
<h2>Mercurial Error</h2>
<p>
An error occured while processing your request:
</p>
<p>
#error|escape#
</p>
#footer#