Display ETH balance in overlay account selector (#4588)

* Add account balance display from ParityBar

* Ellipsis with title

* Balance display in Dapp permissions

* Add balance to vault account selector

* Add key prop to accounts in Vault

* Fix failing test (missing redux prop)

js/src/ui/AccountCard/accountCard.css

@@ -120,6 +120,9 @@
 
   .accountName {
     font-weight: 700 !important;
+    overflow: hidden;
+    text-overflow: ellipsis;
+    white-space: nowrap;
   }
 }
 

js/src/ui/VaultCard/vaultCard.js

@@ -85,7 +85,10 @@ export default class VaultCard extends Component {
         {
           accounts.map((address) => {
             return (
-              <Link to={ `/accounts/${address}` }>
+              <Link
+                key={ address }
+                to={ `/accounts/${address}` }
+              >
                 <IdentityIcon
                   address={ address }
                   center