应用使用defaultsDeep而不是Object.assign混合属性，否则lookup字段的pickScehma属性无法被改写

steedos/steedos-platform#6137

packages/@steedos-widgets/amis-lib/src/lib/converter/amis/fields/lookup.js

@@ -957,8 +957,8 @@ export async function lookupToAmis(field, readonly, ctx){
         if(typeof refLookupPage == 'string'){
             refLookupPage = JSON.parse(refLookupPage);
         }
-        // 先不放开此功能，amis picker组件有bug，无法正常识别deferApi属性，见：https://github.com/baidu/amis/issues/9349，待其修正后才能放开
         // Object.assign(amisSchema, refLookupPage);
+        // amisSchema = _.defaultsDeep({}, refLookupPage, amisSchema);
     }
     return amisSchema;
 }