[josm/plugins]: more imagery layer adding actions to Imagery/More submenu

git-svn-id: http://svn.openstreetmap.org/applications/editors/josm/plugins@29805 b9d5c4c9-76e1-0310-9c85-f3177eceb1e4
[josm/PicLayer] - disable menu items by default

git-svn-id: http://svn.openstreetmap.org/applications/editors/josm/plugins@29807 b9d5c4c9-76e1-0310-9c85-f3177eceb1e4
[josm/PicLayer] - disable menu items by default

git-svn-id: http://svn.openstreetmap.org/applications/editors/josm/plugins@29809 b9d5c4c9-76e1-0310-9c85-f3177eceb1e4