Draw button does not work in WordPress
We can't just do a get to the current page because WordPress has urls that look like this wp-admin/admin.php?page=CiviCRM&q=civicrm%2Fdiagnose&entities=ctNNN
.
Adding the current URL as the action doesn't work either as the page param gets overridden on submit.
A JS redirect to the current page adding/replacing the entities param would be one way to go.