[translations] - Add translations for 'Votable'
[models:law] - Add votable attribute
[law-api] - Expose votable attribute to client
[admin-laws-form] - Add votable field
[proposal-article] - Add hide participants when law is not votable
[proposal-options] - Add hide participants when law is not votable
Merge branch 'add/unvotable-laws' into development