SearchBar提供虚拟键盘search按钮点击回调

[orangeyyy]

请按照以下模板填写

这是一个

• [] 错误报告
• [x ] 功能需求

SaltUI 版本

3.7.5，mac

浏览器、操作系统等环境信息

复现步骤

在无线中的操作习惯是，输入完成以后点击搜索按钮才进行搜索，但是现在没有一个这样的回调，onSearch其实是隔段时间回调一下，和实际习惯不符。

• 你可以在这里提交你的 CodePen 链接 以及描述复现的步骤

[eternalsky]

这个功能比较简单，可以考虑 pr 一下。

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.