fix #josm8540 - Unglue relations not marking relations as modified

git-svn-id: http://svn.openstreetmap.org/applications/editors/josm/plugins@29391 b9d5c4c9-76e1-0310-9c85-f3177eceb1e4
[josm_utilsplugin2] fix project setup

git-svn-id: http://svn.openstreetmap.org/applications/editors/josm/plugins@29392 b9d5c4c9-76e1-0310-9c85-f3177eceb1e4
iodb: small refactoring, also offset watcher


git-svn-id: http://svn.openstreetmap.org/applications/editors/josm/plugins@29394 b9d5c4c9-76e1-0310-9c85-f3177eceb1e4