Proper default accounts RPCs (#4580)

* Default accounts setting - account provider

* RPC support for default accounts

* Updating JS code

* Rename whitelist to addresses

js/src/api/subscriptions/personal.js

@@ -123,8 +123,10 @@ export default class Personal {
           this._accountsInfo();
           return;
 
-        case 'parity_setDappsAddresses':
-        case 'parity_setNewDappsWhitelist':
+        case 'parity_setDappAddresses':
+        case 'parity_setDappDefaultAddress':
+        case 'parity_setNewDappsAddresses':
+        case 'parity_setNewDappsDefaultAddress':
           this._defaultAccount(true);
           this._listAccounts();
           return;