[8] Review request for 8013553: [macosx] java.awt.FileDialog removes file extensions

[Oleg Pekhovskiy]

Hi all,

please review the fix
http://cr.openjdk.java.net/~bagiras/8013553.1/
for
https://bugs.openjdk.java.net/browse/JDK-8013553
setExtensionHidden(NO) method of NSSavePanel doesn't work as expected 
and that's a known issue mentioned on several forums.
But there is another solution based on Application system settings that 
allows to control showing of extension for file dialog.

Thanks,
Oleg