The last address component separator (e.g. comma) is visible

@khusingh Thanks for your help in this issue.

This is a bug when we need a separator before the last optional element.

I want a comma between family_name and organization.
address_line1 locality, Poland given_name family_name, organization

I want organization to be optional.
address_line1 locality, Poland given_name family_name,

I want to hide the separator if the optional element is empty.
address_line1 locality, Poland given_name family_name

Delete duplicate condition, because it was used elsewhere.

     foreach ($config_exclude_hidden as $key => $config_item) {
-      if ($config_item['display'] && !empty($item[$key])) {

// Skip hidden or empty items.
$config_exclude_hidden = [];
foreach ($config as $key => $config_item) {
  if ($config_item['display'] && !empty($item[$key])) {
    $config_exclude_hidden[$key] = $config_item;
  }
}