WebformEntityTrait::setOptions doesn't pass the handler settings correctly

WebformEntityTrait::setOptions() creates an instance of the selection handler and sets the option to an entity reference type element. But it passes to the selection handler the settings incorrectly:

    $selection_handler_options = [
      'target_type' => $element['#target_type'],
      'handler' => $element['#selection_handler'],
      'handler_settings' => (isset($element['#selection_settings'])) ? $element['#selection_settings'] : [],
      // Set '_webform_settings' used to limit and randomize options.
      // @see webform_query_entity_reference_alter()
      '_webform_settings' => $settings,
    ];

The "handler_settings" key doesn't really mean anything to the selection handler plugin and the values inside should go up to the top level of the array before being passed as configuration to the plugin. You can see this best when using the Views selection handler.