代客下单修复已下单菜品选中时再添加商品，未取消已下单菜品选中

src/views/table/components/table-diancan.vue

@@ -1321,6 +1321,7 @@ export default {
     },
     "order.selIndex": function (val, oldval) {
       console.log(val);
+      this.order.old.selIndex=-1
       if (val === -1) {
         // return (this.order.number = 1);
         this.order.cacheNumber = 1;