feat: websocket subscriptions (closes #6)

feat: near completion with v1 backup importing

feat: blocks page

feat: service worker

feat: search results nav, keyboard shortcut ...

Also implements half of the address page, adds a hook for the syncNode,
and some other miscellaneous refactors.

chore: update file headers

fix: name_transferred in dashboard

feat: support custom currencies

fix: sync node in redux

feat: block value card

feat: sync balances with websocket

feat: show existing wallet categories

feat: wallet data syncing

feat: hide advanced wallet formats

feat: initial work on wallet dialogs

feat: translation debug page

refactor: switch to ant-design

feat: initial commit

Initialize project using Create React App