fix: add missing setting translation key ...

Also changes the GitHub issue report link to directly link to the issues
page, to save a few clicks.

feat: legacy wallet migration

fix: difficulty card storage key consistency

feat: persist difficulty chart mode

feat: add tips card

chore: update license information

feat: what's new button

feat: use markdown for motd (closes #34)

i18n: add empty count keys

refactor: remove react import (react v17)

fix: address page auto-refresh (fixes #9)

fix: move SyncWork (fixes #10)

refactor: split up Wallet.ts

refactor: import aliases

refactor: reorganise components, APIErrorResult

feat: new names listing

fix: link to transactions from dashboard

feat: most transaction listing pages

feat: service worker

feat: motd on dashboard

feat: recent transactions on address page

refactor: extract tx summary, fix redux, new hook

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: minor cleanup

feat: most of the search impl

feat: exact matches in search

feat: search box boilerplate

refactor: remove most unnecessary redux hooks

fix: optimise throttle and hooks ...

In the process of fixing some hook dependencies, I introduced a bug
which caused the application to rapidly send requests to the Krist
server (luckily I was using a local Krist instance). To raise awareness
of this if it happens again in the future, I added a notification that
appears whenever the rate limit is hit. Ideally, it should never appear
in production.

refactor: clean api request code

fix: missed one

fix: responsiveness tweaks on dashboard

feat: block difficulty card

feat: initial impl of work chart

feat: fetch transactions card data

feat: nyi warning

chore: update file headers

fix: name_transferred in dashboard

feat: dashboard transactions listing

feat: block value card

feat: wallet overview on dashboard