优化UI

DownKyi/Languages/Default.xaml

@@ -184,7 +184,7 @@
 
     <system:String x:Key="Network">网络</system:String>
     <system:String x:Key="SelectDownloader">选择下载器（重启生效）：</system:String>
-    <system:String x:Key="BuiltinDownloader">内建下载器</system:String>
+    <system:String x:Key="BuiltinDownloader">内建下载器（测试）</system:String>
     <system:String x:Key="Aria2cDownloader">Aria2下载器</system:String>
     <system:String x:Key="AriaServerPort">Aria服务器端口：</system:String>
     <system:String x:Key="AriaLogLevel">Aria日志等级：</system:String>