SilverStripe .ico预览

Question

似乎SilverStripe无法显示.ico文件的预览。这是框架问题还是客户端代码问题？

UploadField已添加到SiteConfig

中

private static $has_one = array(
    'Favicon' => 'Image'
);

$fields->addFieldToTab("Root.Main", UploadField::create('Favicon', 'Favicon'));