Can you explain how to add popup(modal window) on button click in the adminhtml? I already create some phtml
<div id="messages">
<div class="messages">
<?php foreach ($this->getCollection() as $reminder):
?>
<div class="message message-notice notice">
<div data-ui-id="messages-message-notice">Customer name - <?php echo $reminder->getCustomerName()
?>(Order ID #<?php echo $reminder->getOrderIncrementId() ?>); Date/Time - <?php echo $reminder->getDatetime()
?>; Due Date/Time - <?php echo $reminder->getDuedatetime() ?>; Assigned to User - <?php echo $reminder->getName() ?>;
Note - <?php echo $reminder->getTitle() ?><button class="action- scalable primary">asd</button></div>
</div>
<?php endforeach; ?>
</div>
And I really need to know how to add modal action to the button.