[josm_plugins] i18n update

git-svn-id: http://svn.openstreetmap.org/applications/editors/josm/plugins@30413 b9d5c4c9-76e1-0310-9c85-f3177eceb1e4
[josm_editgpx] fix project setup

git-svn-id: http://svn.openstreetmap.org/applications/editors/josm/plugins@30414 b9d5c4c9-76e1-0310-9c85-f3177eceb1e4