361 as a developer i want to use web workers to poll for new txs

[nshCore]

Here is an overview of what got changed by this pull request:

Issues
======
+ Solved 1

Complexity increasing per file
==============================
- src/workers/RefreshWallet/index.js  3
- test/jest/__tests__/workers/RefreshWalletWorker/refreshWorker.spec.js  1
- test/jest/__tests__/components/Modals/ConfirmSend/ConfirmSendModal.spec.js  1
- src/workers/RefreshWallet/worker.js  1

Complexity decreasing per file
==============================
+ src/helpers/AmountFormatter/index.js  -2

Clones added
============
- test/jest/__tests__/workers/RefreshWalletWorker/index.spec.js  2
- test/jest/__tests__/pages/WalletSingle.spec.js  1
- test/jest/__tests__/components/Modals/AddERC20/AddErc20.spec.js  2
- test/jest/__tests__/helpers/RefreshWallet.spec.js  3
- test/jest/__tests__/workers/RefreshWalletWorker/refreshWorker.spec.js  5
- test/jest/__tests__/components/Modals/ConfirmSend/ConfirmSendModal.spec.js  9
- test/jest/__tests__/app.spec.js  1
- src/workers/RefreshWallet/worker.js  9
- src/boot/BackEndService/index.js  2

Clones removed
==============
+ test/jest/__tests__/components/Wallet/SendCoin/SendEthereum.spec.js  -2
+ test/jest/__tests__/layouts/Authed/Authed.spec.js  -2
+ test/jest/__tests__/components/Modals/ConfirmSend/ConfirmSend.spec.js  -2
+ test/jest/__tests__/pages/Setup/Steps/Restore.spec.js  -2
+ test/jest/__tests__/components/Wallet/SendCoin/SendBitcoin.spec.js  -3
+ test/jest/__tests__/pages/Auth/Login.spec.js  -1

See the complete overview on Codacy