RFR: 8081507: Open or Save button in JFileChooser has OK title in GTK LaF

[Abhishek Kumar]

On Thu, 29 Dec 2022 03:40:15 GMT, Sergey Bylokhov <serb at openjdk.org> wrote:

>> Open or Save button in JFileChooser has OK title in GTK LAF. The open/save button text modified as per the native FileChooser. Manual test case is added.
>> 
>> `open/test/jdk/sanity/client/SwingSet/src/FileChooserDemoTest.java` failed with the current fix with an exception `**Wait AbstractButton with text "OK" loaded.**` Updated the test for GTK LAF and tested in CI which is OK now.
>> 
>> CI link is added in JBS.
>
> Marked as reviewed by serb (Reviewer).

@mrserb Can you please sponsor this PR?

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PR: https://git.openjdk.org/jdk/pull/11790