Ledger: New BIP44 checking in ledger firmware 1.6.1+ breaks electrum

[smogm]

Since this new BIP44 enforce checking (LedgerHQ/app-bitcoin@bae78c0) in the app-bitcoin ledger app, the electrum ledger plugin seems not working anymore.

https://support.ledger.com/hc/en-us/articles/360015739499-Sign-or-derivation-path-is-unusual

During startup of the electrum client the Ledger shows "The derivation path is unusual" a few times which you have to "approve" each time.
Maybe the startup and initialization sequence of the electrum ledger plugin is not correct anymore?

Also see LedgerHQ/app-bitcoin#161

[smogm]

I also supplied a fix for this: #6512

[SomberNight]

note: more discussion in #6512