PAR-14333: Show memo when present, and not otherwise

[no-longer-human]

This pull request aims to resolve the PAR-14333 issue. The issue involves a missing memo field in the UI on MPC Token transfer transactions for Ledger Nano S/S+/X, but was present for Ledger Stax devices.

• Ensure that Ledger Nano S/S+/X shows the memo field for transfers with memos.
• Ensure that all devices hides the field for transfers without memos.
• This is verified with a new UI test that signs two different transactions right after each other.
• Additionally: MPC transfer example transactions have been made more distinct, to ensure that tests generate more distinct reference outputs.
• Additionally: Some code-quality related cleanup have been done for the UI tests.
• Version has been bumped to 1.0.1