Fix unhandled exception when attempting to sign message for custom derivation address

[BamaHodl]

Description

This PR fixes the unhandled exception when trying to sign a message from a custom derivation path. The intention in the original code was to show a NotYetImplementedView with a custom text message describing the unsupported feature, however it was implemented as a raise of the view instead of a redirect, as well as a bad initialization of the view (bad parameters).

This pull request is categorized as a:

• [ ] New feature
• [x] Bug fix
• [ ] Code refactor
• [ ] Documentation
• [ ] Other

Checklist

• [x] I’ve run pytest and made sure all unit tests pass before sumbitting the PR

If you modified or added functionality/workflow, did you add new unit tests?

• [ ] No, I’m a fool
• [x] Yes
• [ ] N/A

I have tested this PR on the following platforms/os:

• [ ] Raspberry Pi OS Manual Build
• [ ] SeedSigner OS on a Pi0/Pi0W board
• [x] Other seedsigner-emulator

[newtonick]

ACK and tested. Congrats @BamaHodl on your first SeedSigner merged PR! I appreciate the time put into the PR.

[BamaHodl]

ACK and tested. Congrats @BamaHodl on your first SeedSigner merged PR! I appreciate the time put into the PR.

Thank you! Very proud to have been able to contribute to this project.