<AWT Dev> [9] Review request: 8040007 GtkFileDialog strips user inputted filepath

[Alexander Zvegintsev]

Hello,

please review the fix
http://cr.openjdk.java.net/~azvegint/jdk/9/8040007/00/
for the bug
https://bugs.openjdk.java.net/browse/JDK-8040007

With this fix we don't use current folder from native GtkFileChooser 
anymore, now we build it by ourselves.

[1] 
https://developer.gnome.org/gtk2/stable/GtkFileChooser.html#gtk-file-chooser-get-filenames
[2] 
https://developer.gnome.org/glib/stable/glib-Miscellaneous-Utility-Functions.html#g-path-get-dirname

-- 
Thanks,

Alexander.