RFR: 8300084: AquaFileChooserUI.getDefaultButton returns null [v3]

[Alexey Ivanov]

On Mon, 16 Jan 2023 13:49:23 GMT, Tejesh R <tr at openjdk.org> wrote:

>> In Aqua look and feel, `getDefaultButton()` of `JFileChooser` returns null. The fix overrides the method from `FileChooserUI` to return the `ApproveButton` of `FileChooser` which is similar to other L&F. 
>> The test is run for multiple iterations in CI machine.
>
> Tejesh R has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Removed the test - Updating #11901 test

Looks good to me.

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Marked as reviewed by aivanov (Reviewer).

PR: https://git.openjdk.org/jdk/pull/12008