[API Review]: RT-28289 Unable to determine the selected ExtensionFilter when a FileChooser closes

[Alexander Zvegintsev]

Hi all,

In order to fix
http://javafx-jira.kenai.com/browse/RT-28289 Unable to determine the 
selected ExtensionFilter when a FileChooser closes
we need to extend API of FileChooser:

public final ExtensionFilter getSelectedExtensionFilter()

Returns selected ExtensionFilter of last displayed file dialog.
It may be null if not supported by platform or dialog canceled.

-- 
Thanks,

Alexander.