Use Webpack Aliases (#3711)

* Adds aliases to Webpack Build

* Use `ui` Webpack alias

* Use `views` alias

* Use `modals` aliase

* Use `providers` aliase

* Use `contracts` aliase

* Use '~' aliase

* from `ui` to from `~/ui`

* from  to from

* from `modals` to from `~/modals`

* from `providers` to from `~/redux/providers`

* from `contracts` to from `~/contracts`

* Updated Webpack App config

js/src/dapps/tokenreg/Status/actions.js

@@ -14,7 +14,7 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
-import Contracts from '../../../contracts';
+import Contracts from '~/contracts';
 
 import { loadToken, setTokenPending, deleteToken, setTokenData } from '../Tokens/actions';
 

js/src/dapps/tokenreg/utils.js

@@ -16,7 +16,7 @@
 
 import { api } from './parity';
 
-import { eip20 as eip20Abi } from '../../contracts/abi';
+import { eip20 as eip20Abi } from '~/contracts/abi';
 
 export const getTokenTotalSupply = (tokenAddress) => {
   return api