<Swing Dev> [8u20] Review request for 8010718 [macosx] JFileChooser current filter nullified by addChoosableFileFilter

[Alexander Scherbatiy]

Hello,

Could you review the fix:
   bug: https://bugs.openjdk.java.net/browse/JDK-8010718
   webrev: http://cr.openjdk.java.net/~malenkov/8022398.8.0

This is the original fix for the issue 8022398 Use one 
FilterComboBoxModel for all L&Fs.
The general refactoring for the fix 8022398 has been reverted back 
because of
the issue 8032063 
javax.swing.plaf.metal.MetalFileChooserUI$FilterComboBoxModel extends 
non-standard API

The FilterComboBoxModel from AquaFileChooserUI calls clear() during 
choosable file filter changed event
which leads setting to null the JFileChooser fileFilter.

FilterComboBoxModels from other FileChooserUI does not have this issue.
The fix reuses the standard FilterComboBoxModel implementation from 
other L&Fs.

See the original discussion: 
http://mail.openjdk.java.net/pipermail/swing-dev/2013-August/002860.html

Thanks,
Alexandr.