Clicking on email verification does not automatically fill in your email (#5140)

* implement Clicking on email verification does not automatically fill in your email

* set the cursor to the password field

* update per review

* update per review

webapp/components/login/login_controller.jsx

@@ -42,12 +42,17 @@ export default class LoginController extends React.Component {
         this.handleLoginIdChange = this.handleLoginIdChange.bind(this);
         this.handlePasswordChange = this.handlePasswordChange.bind(this);
 
+        let loginId = '';
+        if (this.props.location.query.extra === Constants.SIGNIN_VERIFIED && this.props.location.query.email) {
+            loginId = this.props.location.query.email;
+        }
+
         this.state = {
             ldapEnabled: global.window.mm_license.IsLicensed === 'true' && global.window.mm_config.EnableLdap === 'true',
             usernameSigninEnabled: global.window.mm_config.EnableSignInWithUsername === 'true',
             emailSigninEnabled: global.window.mm_config.EnableSignInWithEmail === 'true',
             samlEnabled: global.window.mm_license.IsLicensed === 'true' && global.window.mm_config.EnableSaml === 'true',
-            loginId: '', // the browser will set a default for this
+            loginId,
             password: '',
             showMfa: false,
             loading: false
@@ -61,6 +66,10 @@ export default class LoginController extends React.Component {
             GlobalActions.redirectUserToDefaultTeam();
         }
 
+        if (this.props.location.query.extra === Constants.SIGNIN_VERIFIED && this.props.location.query.email) {
+            this.refs.password.focus();
+        }
+
         AsyncClient.checkVersion();
     }