FirebirdWebAdmin: Translations updated

Thank you to all what was participated to improve translations of FirebirdWebAdmin!

German: 100% done! Thanks to Martin Köditz!
Polish: Amost done. Thanks to Piotr Czepek and Grzegorz Skoczylas!
Czech: New translation language. Thanks to Tomas Krejzek!
Spanish: Thanks to Duilio Juan Isola!
Portuguese, Brazilian: Thanks to Paulo Junqueira da Costa!
Dutch: Thanks to LucavanB!
Romanian: New translation language. Will be translated step by step by me 🙂

If you want to help us to cover all translations you can join in our project:
https://crowdin.com/project/firebirdwebadmin