Error if Title field not included in pop-up form

Line 213 is this:
$entity_title = $ief_form['title']['widget'][0]['value']['#default_value'];

Inspecting that, I found that that $ief_form['title']['widget'] contains [ 0 => null ].

$ief_form['#default_value'] is set to the Node that is being edited. As such, line 213 can be changed to:
$entity_title = $ief_form['#default_value']->get('title')->value;

This is in the 'edit' action. The 'duplicate' action looks to be handled identically, and so I've included the same fix for that.

Automatically closed - issue fixed for 2 weeks with no activity.