Ethereum backend to manage the list of wallets

**Feature description**

List Ethereum wallets

**Is your feature request related to a problem? Please describe.**
Ethereum wallets not listed in user interface after #246

**Describe the solution you'd like**
Wallets should be added in GUI , in a similar way to image shown below, but adapted to ETH


**Describe alternatives you've considered**
A clear and concise description of any alternative solutions or features you've considered.

**Additional context**
Needs #177 to render full BIP44 account and address tree . Needs #178 for fast

**Possible implementation**

- [ ] Implement Ethereum wallet storage
- [ ] Implement Ethereum wallet set based on previous component