[Koha-translate] 3.12 translation

Hi, I remind you that we are approaching the 3.12.9 release date and there are a couple of new strings that need your attention :-D Regards To+ -- Tomás Cohen Arazi Prosecretaría de Informática Universidad Nacional de Córdoba ✆ +54 351 4333190 ext 13168 GPG: B76C 6E7C 2D80 551A C765 E225 0A27 2EA1 B2F3 C15F