Function DemoModalHead 

fn DemoModalHead(props: DemoModalHeadProps) -> impl IntoView

演示弹窗头部：与正式弹窗同为 .asset-modal-head，关闭前多一个「恢复默认」。

Required Props

• title: [&'static str]
• on_reset: impl Into<Callback<()>>
• on_close: impl Into<Callback<()>>