[josm_pdfimport, josm_merge-overlap] see #josm8775 - IllegalComponentStateException when remembering position of dialogs not displayed on screen

git-svn-id: http://svn.openstreetmap.org/applications/editors/josm/plugins@29644 b9d5c4c9-76e1-0310-9c85-f3177eceb1e4
[josm_merge-overlap] cleanup project

git-svn-id: http://svn.openstreetmap.org/applications/editors/josm/plugins@29645 b9d5c4c9-76e1-0310-9c85-f3177eceb1e4
[josm_pdfimport] cleanup project

git-svn-id: http://svn.openstreetmap.org/applications/editors/josm/plugins@29646 b9d5c4c9-76e1-0310-9c85-f3177eceb1e4