Enable hidden licenses for Licensee | Creative Commons, EUPL

Description

Originally raised because it was noticed that "EUPL license missing in Licence Dropdown"

Add EUPL to Licence Templates

### Proposal

Show EUPL in every Language - It is not valid until every Language is not displayed!

### Links / references
https://joinup.ec.europa.eu/community/eupl/og_page/eupl

Proposal

Add further licenses that are classified as 'hidden' by Licensee