Add a mechanism to notify developers, that the user dismissed the feedback

[ueman]

There should be a way to get notified if the user chooses to dismiss the feedback ui.

[yamashita-room-335]

+1

I am creating a long Column form in customFeedback. Since the user can close the Feedback UI with a single tap of the close button, I am concerned that the content being entered could easily be discarded by the user unintentionally.

Therefore, I think it would be a better library if a confirmation dialog can be displayed when closing the Feedback UI so that the user can handle the fact that the close button was tapped.

Of course, we could also measure the number of users who tried to send feedback but stopped because it became tedious!