po: update po/de_DE/admin.po (pulled from Transifex.net by CiviCRM l10n maintainer)
po: update po/de_DE/case.po (pulled from Transifex.net by CiviCRM l10n maintainer)
po: update po/de_DE/contribute.po (pulled from Transifex.net by CiviCRM l10n maintainer)