Validate sendToken address when component updates (#9907)

* Validate sendToken address when component updates

On a reproduction of trying to get the error message it seems that if an token address is provided in the address form with ETH selected then changing to a token address, the error message won't show.

This will validate the sendtoken address on prop change to properly update the warning message.

* Update test to include second doesAmountErrorRequireUpdate call when state is updated and component is updated

ui/app/pages/send/send.component.js

@@ -154,6 +154,7 @@ export default class SendTransactionScreen extends Component {
 
     if (sendTokenAddress && prevTokenAddress !== sendTokenAddress) {
       this.updateSendToken()
+      this.validate(sendTokenAddress)
       updateGas = true
     }
 

ui/app/pages/send/tests/send-component.test.js

@@ -138,7 +138,7 @@ describe('Send Component', function () {
           balance: '',
         },
       })
-      assert(utilsMethodStubs.doesAmountErrorRequireUpdate.calledOnce)
+      assert(utilsMethodStubs.doesAmountErrorRequireUpdate.calledTwice)
       assert.deepEqual(
         utilsMethodStubs.doesAmountErrorRequireUpdate.getCall(0).args[0],
         {