Ask for confirmation on deleting contacts / Undo deleted contacts
When deleting a contact through clicking the "cross" button there is no confirmation message:
"Are you sure that you want to delete the contact 'so and so'?"
The contact is deleted and if the button is clicked not on purpose there is no way to stop the deletion process or to undo the deleted contact.
Therefore one of those methods would be great for protonmail:
* either "delete confirmation" for the clicked contact
* or the undo deleted contact button.
Thanks very much.
Actually this feature is so important to avoid problems that I was about to included in bugs.

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ms commented
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drhorat commented
Delewting only one contact clicking the cross button, every contacts disappeared instantly. All my contacts, not just the contact I wanted to remove... And no confirmation message!