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.
default = "changelog"
header = header-rss.tmpl
changelog = changelog-rss.tmpl
changelogentry = changelogentry-rss.tmpl
filelog = filelog-rss.tmpl
filelogentry = filelogentry-rss.tmpl