RFR: 6972078: Can not select single directory with GTKLookAndFeel [v6]

[Patrick Chen]

On Tue, 8 Nov 2022 07:06:27 GMT, Abhishek Kumar <abhiscxk at openjdk.org> wrote:

>> While using a JFileChooser with the file selection mode FILES_AND_DIRECTORIES and multiSelection enabled, it is impossible to select a single directory in GTK LAF.
>> 
>> The condition check has been modified when multiselection is enabled and user has selected single directory.
>> After the fix the behavior of JFileChooser is similar to other LAFs.
>> 
>> An automatic test case `test/jdk/com/sun/java/swing/plaf/gtk/TestFileChooserSingleDirectorySelection.java` is implemented and checked in CI pipeline. Link is attached in JBS.
>
> Abhishek Kumar has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Review comment fix

lgtm

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PR: https://git.openjdk.org/jdk/pull/10866