* Revert @parity/* bump

* Fix blockscout link

* Pass down ws-origins flag

* Fix again: use transactionHash

* Update maintainers

* Fix broken image in prod

Fixes errors:

```
{ Error: Cannot find module '@babel/plugin-proposal-class-properties' from '/Users/scon/code/src/paritytech/fether/packages/fether-ui'
```

```
Failed to minify the bundle. Error: static/js/main.f19a0eac.chunk.js from Terser
TypeError: Cannot read property 'minify' of undefined
```

- Add option to import a Parity Signer account. It is then stored in
local storage.

- Send transactions with Parity Signer accounts

- Refactor sendStore so that "token" (and chainId) is inside this.tx;
avoids having to pass `token` around every function, and it makes sense
to put it in the object since it is part of the tx info.

- Add account type (either node or signer) to accountsInfo

- Add account type to withAccount; output props are now `{account:
{address, type}}` instead of `{accountAddress}`

todo:
* add option to export json keyfile to backup
* clean up duplicated code in store