Warn users about "Rotten recovery phrase" when importing an account

[rachelcope]

Description

As a user I want to be warned to not import a recovery phrase that I was given

GIVEN I am importing an account
WHEN I am asked to import an account
THEN I want to be warned to not import a recovery phrase that was given to me

WHY

This is a common phishing scam to give users a compromised recovery phrase

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