[css] use listingHeaderBgColor in old css
this also fix inconsistency between background image / bg color
--- a/web/data/cubicweb.old.css Wed Dec 21 17:59:37 2011 +0100
+++ b/web/data/cubicweb.old.css Mon Dec 19 19:01:15 2011 +0100
@@ -813,7 +813,7 @@
table.listing th {
font-weight: bold;
- background: #ebe8d9 url("button.png") repeat-x;
+ background: %(listingHeaderBgColor)s;
}
table.listing td a,