Concerning #1
We just went ahead and commented out the PHPMyAdmin code...
<!--
<div class="martop10">
<form method="post" action="<?php echo $this->Html->safe(sprintf('https://%s:2083/login/', $server->meta->host_name)); ?>" target="_blank">
<input type="hidden" name="user" value="<?php $this->Html->_($fields->cpanel_username); ?>">
<input type="hidden" name="pass" value="<?php $this->Html->_($fields->cpanel_password); ?>">
<input type="hidden" name="goto_uri" value="/frontend/x3/sql/PhpMyAdmin.html">
<button class="btn btn-default btn-block" type="submit"><i class="fa fa-sign-in"></i> phpMyAdmin</button>
</form>
</div>
-->
Concerning #2
We got the Default WebMail login page to show up with the following modification ...
<!--<input type="hidden" name="user" value="<?php $this->Html->_($fields->cpanel_username); ?>">-->
<!--<input type="hidden" name="pass" value="<?php $this->Html->_($fields->cpanel_password); ?>">-->
<button class="btn btn-default btn-block" type="submit"><i class="fa fa-sign-in"></i> Webmail</button>