fix positioning of password label, add autofocus to password field

apps/files_sharing/templates/authenticate.php

@@ -1,8 +1,8 @@
 <form action="<?php echo $_['URL']; ?>" method="post">
 	<fieldset>
-		<p>
+		<p class="infield">
 			<label for="password" class="infield"><?php echo $l->t('Password'); ?></label>
-			<input type="password" name="password" id="password" value="" />
+			<input type="password" name="password" id="password" value="" autofocus />
 			<input type="submit" value="<?php echo $l->t('Submit'); ?>" />
 		</p>
 	</fieldset>