[Phpmyadmin-translators] bulgarian translation for version 2.4.0

Hi everybody, I saw that Bulgarian translation of version 2.4.0 is not fully completed and I asked the offical translator(Georgi Georgiev <chutz@chubaka.homeip.net>) if can I contunue the translation. He gave me card-blanche, so I'm the new translator for Bulgarian version. I attach the updated files for Bulgarian translation. Best Regards! Stanislav