Backout "[web/navigation] use add_onload instead of inline javascript href" This reverts changeset 170e1437948d, for at least two reasons: the PageNavigationSelect component was not updated for the new type of navigation links, and external cubes defining View.page_navigation_url exist in the wild and also got broken navigation links. This reopens #3501626 and closes #3677945.

/* 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;
}