Make the recovery phrase confirmation and Account recovery more user friendly

[Tbaut]

1. Make the recovery phrase confirmation optional/skippable
2. Be able to view the recovery phrase later on and confirm it
3. Warn the user when more than x Eth have been moved on an account for which the recovery phrase hasn't been verified.
4. For the phrase approval, instead of letting the user type the whole words, we should have suggestion/auto-completion
5. If an unknown word is typed in, an error message should let the user know that this is not a valid word.

[amaury1093]

Proposed by @fckt

Alexey Encrypted by a verified device hey! I've got a really simple solution on how to solve this problem: "we want to force users to backup their seed, but we don't want to be annoying and force users to do what they don't want to do" Encrypted by a verified device so the idea: on the "seed check screen" we can add a bottom, entitled as "Check later" and then add a flag to that account which means "there is no prove that this account is recoverable" and show it somehow in the interface

Alexey 15:07Encrypted by a verified device we could go further even. If, for example, user stores some good amount of ETH on account for which we have no proof that it could be recovered we can warn user somehow

If I'm not mistaken Exodus does this: the Backup step is optional, but if you don't backup they show a warning sign.

[Tbaut]

That definitely a good idea, Status and mist are doing it in a similar manner too.