Add a new stationery underline style

[redcell2323]

The textarea cannot be set to this stationery style. Can this feature be enabled?

[github-actions]

Hello @redcell2323, your issue has been closed because it does not conform to our issue requirements. Please use the Issue Helper to create an issue, thank you!

你好 @redcell2323，为了能够进行高效沟通，我们对 issue 有一定的格式要求，你的 issue 因为不符合要求而被自动关闭。你可以通过 issue 助手 来创建 issue 以方便我们定位错误。谢谢配合！