fix #10255 - don't issue style warnings for boundaries

git-svn-id: https://josm.openstreetmap.de/svn/trunk@7583 0c6e7542-c601-0410-84e7-c038aed88b3b
i18n update

git-svn-id: https://josm.openstreetmap.de/svn/trunk@7584 0c6e7542-c601-0410-84e7-c038aed88b3b