hgweb: don't try to show repo on repo-not-found page in monoblue

hgweb: don't try to show repo on repo-not-found page in monoblue

--- a/mercurial/templates/monoblue/notfound.tmpl	Tue Jun 30 23:31:19 2015 +0800
+++ b/mercurial/templates/monoblue/notfound.tmpl	Tue Jun 30 23:34:12 2015 +0800
@@ -1,5 +1,5 @@
 {header}
-    <title>{repo|escape}: Mercurial repository not found</title>
+    <title>Mercurial repository not found</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>