* allow cancellation of all background tasks via clicking [X] on the window

git-svn-id: svn://svn.code.sf.net/p/filebot/code/trunk@2709 40b5aca5-6b98-4155-8834-ff3a5bb60073
* use positive code to avoid issues with launch4j launcher

git-svn-id: svn://svn.code.sf.net/p/filebot/code/trunk@2710 40b5aca5-6b98-4155-8834-ff3a5bb60073