dropdown for product variant picker

snippets/product-variant-picker.liquid

@@ -124,7 +124,7 @@
 
               <div data-value="{{ product_variant.title }}">
                 <span>fimg: {{ f_img }}</span>
-                <img src="{{ f_img | asset_url }}" height="100" width="100">
+                <img src="{{ f_img | file_img_url }}" height="100" width="100">
                 <span>{{ product_variant.title }}</span>
               </div>
             {% endfor %}