Passphrase not supported for signing transactions

**Feature description**

Support passphrase for signin transactions

**Is your feature request related to a problem? Please describe.**
If passphrase is configured on device then Skywallet manages an address sequence different from using no passphrase at all . Transaction signing handler does neither seems to be aware of this nor even offers .

**Describe the solution you'd like**
Implement `usePassphrase` in `msgTransactionSignImpl` and `fsm_msgTransactionSign`

**Describe alternatives you've considered**
This has to be implemented for consistency with other functions.

**Additional context**
Needs similar issues in client libraries.

**Possible implementation**

- [ ] Read device settings and use passphrase if option set
- [ ] Add optional `usePassphrase` in message to force using (ignoring) passphrase if value set
- [ ] If passphrase set derive master node from master seed prior to signing Skycoin transaction.