title: How to add a button to a custom post type in Wordpress?
body: <p>I have a "Products" custom post type. Normally, this custom post type have an "Add New" button. I want to add another button call "Update from Provider".</p>
  
  <p>Currently, I have modify the Wordpress code (in "wordpress\wp-admin\includes\class-wp-list-table.php") to add that button. In this case, when I update Wordpress, my modified code will be deleted. Therefore, I need to move that button to my plug-in code.</p>
  
  <p>In this case, please help me how to move that button to my plug-in code.</p>
  
  <p><img src="https://i.stack.imgur.com/wtt25.jpg" alt="enter image description here"></p>