优化tableData;新增dataGet；

public/static/plugs/ulthon-admin/ulthon-admin.js

@@ -2433,13 +2433,15 @@
                 defaultValue = undefined;
             }
 
+            return admin.dataGet(this.dataBrage, keys, defaultValue);
+        },
+        dataGet(data, keys, defaultValue) {
             return (
                 (!Array.isArray(keys)
                     ? keys.replace(/\[/g, '.').replace(/\]/g, '').split('.')
                     : keys
-                ).reduce((o, k) => (o || {})[k], this.dataBrage) || defaultValue
+                ).reduce((o, k) => (o || {})[k], data) || defaultValue
             );
-
         },
         getExtGroupName(ext) {
             var groupName = 'file';