i18n: add empty count keys

refactor: remove react import (react v17)

feat: more utils for translators

feat: near completion with v1 backup importing

refactor: split up Wallet.ts

feat: backup results tree

fix: re-add onCancel to ImportBackupModal

feat: more backup import progress

fix: replace ant-design Upload with bare html ...

The Upload component added 24 kB to the bundle, which was pretty
ridiculous considering we were only using 1% of its features.

feat: more progress on backup import

refactor: import aliases

feat: begin work on backup importing