[josm_utilsplugin2]: select boundary by double-click; multitagger table highlights

git-svn-id: http://svn.openstreetmap.org/applications/editors/josm/plugins@30419 b9d5c4c9-76e1-0310-9c85-f3177eceb1e4
[josm_utilsplugin2] fix compile error

git-svn-id: http://svn.openstreetmap.org/applications/editors/josm/plugins@30421 b9d5c4c9-76e1-0310-9c85-f3177eceb1e4