Allow to cancel a file save without showing error

[harbin1053020115]

In my case, I need to validate my customTextEditor which is rendered as a form before save file. Right now, I have to throw Error to provent saving file, but this lead to the notification shown in right-bottom corner:

It is a better experience which only show form validate result in the form.

[vscodenpa]

This feature request is now a candidate for our backlog. The community has 60 days to upvote the issue. If it receives 20 upvotes we will move it to our backlog. If not, we will close it. To learn more about how we handle feature requests, please see our documentation.

Happy Coding!

[vs-code-engineering]

This feature request has not yet received the 20 community upvotes it takes to make to our backlog. 10 days to go. To learn more about how we handle feature requests, please see our documentation.

Happy Coding!