fix:5737【销售订单】退货单列表，界面列表增加型号、规格字段出来，可进行列设置等

src/views/saleManage/saleOrder/returnGoods/components/inventoryTable.vue

@@ -406,6 +406,20 @@
             showOverflowTooltip: true,
             align: 'center'
           },
+          {
+            minWidth: 120,
+            prop: 'modelType',
+            label: '型号',
+            showOverflowTooltip: true,
+            align: 'center'
+          },
+          {
+            minWidth: 120,
+            prop: 'specification',
+            label: '规格',
+            showOverflowTooltip: true,
+            align: 'center'
+          },
           {
             width: 140,
             prop: 'pricingWay',