Kepler

This looks like a problem with my recent FileDialog changes for the Mac.
I'm working on a fix now

T
The issue here is that under Mac OS X, we are now using FileDialog instead of JFileChooser
because FileDialog has the native L&F. The problem was that we were not getting the
directory from the FileDialog. There are probably other bugs here, it would be good
to have a better defined testsuite.

To replicate the bug:
1. Under Mac OS X, start up with FileDialog:
java -Dptolemy.ptII.useFileDialog=true -classpath $PTII ptolemy.vergil.VergilApplication

2. File->New->Graph Editor

3. Actors -> IO -> Drag a FileReader in.

4. Double click on the FileReader, hit Browse.

5. Browse to a directory outside the ptII tree, select a text file.

Formerly, the path would be incorrectly set to a path inside
the ptII tree. For example, if I selected /Temp/foo/bar/bif.txt, then
the path would end up as /Users/cxh/ptII/bif.txt

Original Bugzilla ID was 5439