[DCP-o-matic] DCP-o-matic string freeze for 2.14.0

Hi all, With commit aa4fa75 I'll put DCP-o-matic into "string freeze" until 2.14.0 is released. That means I won't change any of the translatable strings until then. This would be a great time for all you lovely translators to update the translations for DCP-o-matic! Many of the current translations have significant gaps, as you can see by checking: https://dcpomatic.com/i18n Any help that you can provide is very much appreciated :) Do let me know if there's anything I can help with. Also, if you intend to provide translations but haven't got the time, at the moment, do let me know so I can plan my releases accordingly. Kind regards, Carl