实现搜索时不关闭面板

1、ecode实现示例，全局生效

```javascript
weappUtils.regOvProps(
  'weappEbdfpage',
  'TableViewContent',
  (props) => {
    var store = props.tableViewStore;
    var fn = store.viewHeaderStore.onVisibleChange;
    store.viewHeaderStore.onVisibleChange = (visible) => {
      if (visible !== undefined) {
        fn(visible);
      }
    };
  },
  0,
);
```

2、代码块实现示例，单表格视图生效

```javascript
var fn = ebdfListSdk.getListStore().viewHeaderStore.onVisibleChange;
ebdfListSdk.getListStore().viewHeaderStore.onVisibleChange = (visible)=>{
    if(visible!==undefined){
        fn(visible)
    }
}
```
