Trad: Update translation files

htdocs/langs/ar_AR/admin.lang

htdocs/langs/ar_AR/agenda.lang

htdocs/langs/ar_AR/banks.lang

htdocs/langs/ar_AR/bills.lang

htdocs/langs/ar_AR/boxes.lang

htdocs/langs/ar_AR/categories.lang

htdocs/langs/ar_AR/commercial.lang

htdocs/langs/ar_AR/companies.lang

htdocs/langs/ar_AR/compta.lang

htdocs/langs/ar_AR/contracts.lang

htdocs/langs/ar_AR/dict.lang

htdocs/langs/ar_AR/donations.lang

htdocs/langs/ar_AR/errors.lang

htdocs/langs/ar_AR/exports.lang

htdocs/langs/ar_AR/ftp.lang

htdocs/langs/ar_AR/install.lang

htdocs/langs/ar_AR/languages.lang

htdocs/langs/ar_AR/mails.lang

htdocs/langs/ar_AR/main.lang

htdocs/langs/ar_AR/members.lang