Add note/ comment feature, when sharing a page.

Lastly, seen you made some pretty good upgrades on the sharing functionality. What would be nice, imho, to have a possibility to add a note/comment when sharing a document through the share button. So that the user can see the comment in the sharing notification in the email.

As see in my sketch, there could be a text field below the search field for invited. In the text field, you can leave a comment, that will be displayed inside the notification email. (Just like when actually commenting)

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