[ajax] fix the fix introduced in 3.9.1 to avoid duplicated loads: it cause some other errors since the browser may load the script *after* the server-response event is emited, causing pb if the script interact with this event
/* sortable tables */
table.listing tr .headerSortUp {
background-image: url(asc.gif);
}
table.listing tr .headerSortDown {
background-image: url(desc.gif);
}
table.listing tr .headerSortDown, table.listing tr .headerSortUp {
background-color: %(listingBorderColor)s;
background-repeat: no-repeat;
background-position: center right;
}