hgweb: fixed IE display problem on changelog page
IE (v6.0) didn't seemed to comply to the 15% width on the
left column of changelog display.
Tested with IE v6.0 and Firefox 1.0.6.
#header#
<title>Mercurial repositories index</title>
</head>
<body>
<h2>Mercurial Repositories</h2>
The specified repository "#repo#" is unknown, sorry.
Please go back to the main repository list page.
#footer#