Yes, it's possible with 2 small modifications:
Change file: components/com_customproperties/hrlper.php , line 189
Code:
$rel = "{handler: 'iframe', size: {x: 570, y: 400}}";
This is for the popup when you click 'Edit tags'
And change file: plugins/editors-xtd/cptags/cptags.php, line 80
Code:
$button->set('options', "{handler: 'iframe', size: {x: 570, y: 400}}");
This is for the popup when you click the CPtags button under the editor.
