Fix max width on 2FA pages

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

core/css/guest.css

@@ -471,6 +471,10 @@ form .warning input[type='checkbox']+label {
 	color: #fff !important;
 }
 
+.body-login-container.two-factor {
+	max-width: 290px;
+	margin: 15px auto 0;
+}
 .two-factor-provider {
 	display: flex;
 	border-radius: 3px; /* --border-radius */

core/templates/twofactorselectchallenge.php

@@ -1,7 +1,7 @@
 <?php
 $noProviders = empty($_['providers']);
 ?>
-<div class="body-login-container update">
+<div class="body-login-container update two-factor">
 	<h2 class="two-factor-header"><?php p($l->t('Two-factor authentication')) ?></h2>
 	<?php if (!$noProviders): ?>
 	<p><?php p($l->t('Enhanced security is enabled for your account. Choose a second factor for authentication:')) ?></p>

core/templates/twofactorshowchallenge.php

@@ -11,7 +11,7 @@ $provider = $_['provider'];
 $template = $_['template'];
 ?>
 
-<div class="body-login-container update">
+<div class="body-login-container update two-factor">
 	<h2 class="two-factor-header"><?php p($provider->getDisplayName()); ?></h2>
 	<?php if ($error): ?>
 			<?php if($error_message): ?>