Enhance product selection UI

- Added cursor pointer style to the product selection area for better user experience.
- Updated click event handler to toggle active state on the new '.control-label-nav' class, improving the interaction for selecting products.

themes/classic/assets/css/custom.scss

@@ -708,6 +708,7 @@ body#product {
                 flex-direction: row;
                 justify-content: space-between;
                 align-items: center;
+                cursor: pointer;
 
                 &.active {
                   .form-control-select-standard-handler {