Discount Code Generator Copies without linebreaks

Issue Summary

Hello. The discount code generator is a great addition but I had a problem copying the generated codes and pasting into the code field. The return carriages would drop out when I pasted it. It looks like the problem has to do with the "/n" being used to separate each code within the generator form is not translating well when pasted into the discount creation form.

To fix this I edited the file uc_discounts.admin.inc at line 1166 to
$form_state['storage']['codes'] = implode("<br />", $codes);

The '<br />' seems to be retained when pasted into the discount creation page. Let me know if there's a better way to do this but this works for now.

thanks!