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.
<item>
<title>#desc|firstline|escape#</title>
<link>#url#?cmd=changeset;node=#node#</link>
<description><![CDATA[#desc|escape|addbreaks#]]></description>
<author>#author|obfuscate#</author>
<pubDate>#date|rfc822date#</pubDate>
</item>