Poll for authentication completion

on registration (both for email validation and completion of the
whole auth session).

src/components/structures/InteractiveAuth.js

@@ -57,6 +57,10 @@ export default React.createClass({
         sessionId: React.PropTypes.string,
         clientSecret: React.PropTypes.string,
         emailSid: React.PropTypes.string,
+
+        // If true, poll to see if the auth flow has been completed
+        // out-of-band
+        poll: React.PropTypes.bool,
     },
 
     getInitialState: function() {
@@ -97,10 +101,21 @@ export default React.createClass({
                 errorText: msg
             });
         }).done();
+
+        this._intervalId = null;
+        if (this.props.poll) {
+            this._intervalId = setInterval(() => {
+                this._authLogic.poll();
+            }, 2000);
+        }
     },
 
     componentWillUnmount: function() {
         this._unmounted = true;
+
+        if (this._intervalId !== null) {
+            clearInterval(this._intervalId);
+        }
     },
 
     _authStateUpdated: function(stageType, stageState) {

src/components/structures/login/Registration.js

@@ -311,6 +311,7 @@ module.exports = React.createClass({
                     sessionId={this.props.sessionId}
                     clientSecret={this.props.clientSecret}
                     emailSid={this.props.idSid}
+                    poll={true}
                 />
             );
         } else if (this.state.busy || this.state.teamServerBusy) {

src/components/views/login/InteractiveAuthEntryComponents.js

@@ -184,6 +184,7 @@ export const EmailIdentityAuthEntry = React.createClass({
         errorText: React.PropTypes.string,
         authSessionId: React.PropTypes.string.isRequired,
         inputs: React.PropTypes.object.isRequired,
+        stageState: React.PropTypes.object.isRequired,
     },
 
     render: function() {