Update wallet setup UI to update V2 design

[dmigwi]

• [x] Update landing page
• [x] update view seed page
• [x] update verify seed page
• [x] add new wallet password page
• [x] implement new create wallet functionality (backup later and back up now) for DCR and BTC
• [ ] implement restore functionality
• [ ] implement import watch only wallet functionality
• [ ] implement backup later functionality after wallet creation
• [ ] implement network functionality
• [ ] Optimize codes

(Issue originally authored by: @Kennedy Izuegbu in gitlab.com)