Alert verifiers when a verified account is reset

### Please agree to the following

- [x] I have searched [existing issues](https://github.com/cryptomator/hub/issues?q=) for duplicates
- [x] I agree to follow this project's [Code of Conduct](https://github.com/cryptomator/hub/blob/develop/.github/CODE_OF_CONDUCT.md)

### Summary

As an account verifier, I want to know that an account has been reset, rather than only seeing its unverified again

### System Setup

```markdown
- Hub: 1.4.0-beta1
```

### Steps to Reproduce

1. As `admin`, share a vault `test` with `alice`
2. As `admin`, verify `alice`
3. As `alice`, reset the account
4. As `admin` open vault details of `test`

### Expected Behavior

I want to get the information, that the signature of `alice` did change

### Actual Behavior

`alice` is shown as unverified again and in the console is logged

```
TrustDetails.vue:61 WoT signature verification failed. Error: Alleged public key does not match signed public key
at verifyRescursive (wot.ts:69:13)
at async Object.verify (wot.ts:52:3)
at async computeTrustLevel (TrustDetails.vue:58:7)
```

### Reproducibility

Always

### Relevant Log Output

### Anything else?

If `admin` verifies `alice` again, the console output is gone again (which is expected).