UI component updates (#4010)

* Update blockStatus & test results

* IdentityIcon rendering tests for #3950

* Update IdentityName with external messages

* Expand to cover basic layout sections

* ConfirmDialog rendering tests

* TxHash expansion & tests

* Cleanup ui/*.spec.js PropType warnings

* Use react-intl plural for confirmation/confirmations (verified manually)

js/src/ui/GasPriceEditor/gasPriceEditor.spec.js

@@ -29,6 +29,7 @@ const api = {
 
 const store = {
   estimated: '123',
+  histogram: {},
   priceDefault: '456',
   totalValue: '789',
   setGas: sinon.stub(),