Title label no longer in the code

[newscloud]

What steps will reproduce the problem?

Upgraded to 2.1 using composer

What's expected?

previously a text label visually appeared below each icon

What do you get instead?

only the icons

Additional info

Here was the old code that was generated
<div id="w0" class="auth-clients"><ul class="auth-clients clear"><li class="auth-client"><a class="google auth-link" href="/site/auth?mode=signup&amp;authclient=google"><span class="auth-icon google"></span><span class="auth-title">Google</span></a></li><li class="auth-client"><a class="facebook auth-link" href="/site/auth?mode=signup&amp;authclient=facebook"><span class="auth-icon facebook"></span><span class="auth-title">Facebook</span></a></li><li class="auth-client"><a class="linkedin auth-link" href="/site/auth?mode=signup&amp;authclient=linkedin"><span class="auth-icon linkedin"></span><span class="auth-title">LinkedIn</span></a></li></ul></div>
The visible label is generated by the html
<span class="auth-title">Facebook</span>

AuthChoice.php has code in clientclink to generate the auth-icon
$text = Html::tag('span', '', ['class' => 'auth-icon ' . $client->getName()]);
but there's no code to generate auth-title
although it is defined in the css

Q	A
Yii version	2.0.15
Yii Auth Client version	2.1.5
Yii HTTP Client version
PHP version	7.x
Operating system