Add option to close the notification

[vampywiz17]

Hello there,

Please add option to close the notification messages. Sometimes it not disappear it automatically, and only way to hide it, when we are click it, but it open the notified thing.

Some forum topic, that report this:

https://bbs.deepin.org/en/post/232212

https://bbs.deepin.org/en/post/251009