fix #8638 - Presets: Allow editing of multiselect values in wrong order

git-svn-id: http://josm.openstreetmap.de/svn/trunk@5912 0c6e7542-c601-0410-84e7-c038aed88b3b
add schema file for gpx extensions


git-svn-id: http://josm.openstreetmap.de/svn/trunk@5913 0c6e7542-c601-0410-84e7-c038aed88b3b