Task #41395 "Add Another Item" Clears Current Selection on BFN Form

Added overlay to bulk node form
Consider reversing your logic. Typically it's better to not have the majority of your logic in an If statement.

In this case 

```
if (!is_array($bpn_var)) {
  return 'none';
}
$key = $node_type . '_' .$option;
return (array_key_exists($key, $bpn_var)) ? $bpn_var[$key] : 'none';
```

This puts the emphasis on the last 2 lines as the main sting.