Refactor product ordering logic to use POST data; improve query structure and enhance readability

templates/products/main_view.php

@@ -81,7 +81,7 @@
           { width: 'auto', name: 'roas' },
           { width: 'auto', name: 'cl3', orderable: false },
           { width: '200px', orderable: false }],
-        order: [ [0, false], [ 4, 'desc'] ]
+        order: [ [ 5, 'desc' ] ]
       });
     });