Fix Shopping-cart CSS and JS

lms/static/sass/views/_shoppingcart.scss

@@ -527,7 +527,6 @@ $light-border: 1px solid $gray-l5;
             opacity: 0.8;
             box-shadow: none;
             border: none;
-            background: none;
             width: auto;
             height: auto;
             text-shadow: none;

lms/templates/shoppingcart/shopping_cart.html

@@ -409,8 +409,8 @@ from openedx.core.lib.courses import course_image_url
                           var oldId = data['oldToNewIdMap'][i]['oldId'];
                           var newId = data['oldToNewIdMap'][i]['newId'];
 
-                          $('input.spin-counter[data-item-id]=' + oldId ).data('item-id', newId);
-                          $('button.btn-remove[data-item-id]=' + oldId ).data('item-id', newId);
+                          $("input.spin-counter[data-item-id='" + oldId + "']").data('item-id', newId);
+                          $("button.btn-remove[data-item-id='" + oldId + "']").data('item-id', newId);
                       }
                       if(isbusinessType){
                           $( "div[name='payment']").addClass('hidden');