po: update po/de/common-base.po (pulled from Transifex.net by CiviCRM l10n maintainer)
po: update po/pl/common-base.po (pulled from Transifex.net by CiviCRM l10n maintainer)
po: update po/pl/menu.po (pulled from Transifex.net by CiviCRM l10n maintainer)