Sort experiments by expiration date on extensions view.

www/aptui/js/experiments.js

@@ -159,8 +159,13 @@ $(function ()
 	SetFilters(table);
 
 	// Initial sort.
+	if (hash === "#extending") {
+	    table.find('th:eq(10)').trigger('sort');
+	}
+	else {
 	    table.find('th:eq(0)').trigger('sort');
 	}
+    }
 
     function SetFilters(table)
     {