RFR: 8226990: GTK & Nimbus LAF: Tabbed pane's background color is not expected one when change the opaque checkbox. [v11]

[Abhishek Kumar]

On Thu, 2 May 2024 06:05:08 GMT, Abhishek Kumar <abhiscxk at openjdk.org> wrote:

>> JTabbedPane's content area, tab area and tab background color are not as expected when opaque is set to true or false. 
>> The proposed fix is to handle the TabbedPane's background color in installed LAFs. Manual test is added to support the fix and there is no regression caused by the fix. 
>> 
>> Proposed fix is tested in Ubuntu 22.04 and Oracle linux.
>> 
>> CI link is posted in JBS.
>
> Abhishek Kumar has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Instruction and jtreg tag update

[JDK-6462396](https://bugs.openjdk.org/browse/JDK-6462396) linked to [JDK-8226990](https://bugs.openjdk.org/browse/JDK-8226990)

-------------

PR Comment: https://git.openjdk.org/jdk/pull/17720#issuecomment-2089721636