明细审批放大镜逻辑调整，只赋值当前行

(cherry picked from commit 2ee61250d74750d01a8c445e954739b6ebe3f5a3)

uas-office-web/wxuasapproval/src/pages/approval/Approval.jsx

@@ -717,7 +717,7 @@ class Approval extends Component {
       })
     } else {
       detailList.forEach((showModel, index) => {
-        if(selectModel.rowIndex == index) {
+        if(selectModel.rowIndex == showModel.rowIndex) {
           if (showModel.valuesKey in dataObj) {
             showModel.values = dataObj[showModel.valuesKey]
           }