po: update po/el/hrdcase.po (pulled from Transifex.net by CiviCRM l10n maintainer)
po: update po/sl/common-base.po (pulled from Transifex.net by CiviCRM l10n maintainer)
po: update po/sl/contribute.po (pulled from Transifex.net by CiviCRM l10n maintainer)
po: update po/sl/menu.po (pulled from Transifex.net by CiviCRM l10n maintainer)
po: update po/sl/pledge.po (pulled from Transifex.net by CiviCRM l10n maintainer)