Make src/utils.js independent from other project's modules

[alexruzenhack]

These are the dependencies of src/utils.js from other project's modules:

import baseStyle from './styles/init';
import { KEYCHAIN_USER, NANO_CONTRACT_FEATURE_TOGGLE } from './constants';
import { STORE } from './store';
import { TxHistory } from './models';
import { COLORS, STYLE } from './styles/themes';

Here are the rules of the game:

• It can only depend of other module that don't have other project's module dependency either
• It can't form cycles