Update the account derivation scheme

- account adding is async now and requires connected device
- use BIP32 scheme: m/cointype/reserved'/account'/change/address
- use hardened derivation through `getPublicKey` device call to acquire the
  account node
- continue to use the public derivation trough the plugin method to derive the
  externa/change and address nodes
Use red text for dev in err state
Lookup only unique txs for simpleSign, fix edgecase in fee display
Fix account creation
Remove the error state for now
Fix scrolling now working after modal show