* Set default unit to 'ETH' instead of 'ether'
* Use 'isEtherUnit()' everywhere
* Set default unit to empty string
* Update isEthUnit to isNetworkUnit
* Fix unit conversion for non-ethereum networks
* Set default network unit properly
* Fix tests
* fix typos
* Update isNetworkUnit selector
* Update isNetworkUnit
* Fix validationhelpers tests
* Add mock state to tests & Move isNetworkUnit to selectors
* Fix validation helper spec
* fix unit swap spec