RFR: 8286620: Create regression test for verifying setMargin() of JRadioButton [v3]

[Tejesh R]

On Tue, 31 May 2022 11:30:55 GMT, Alexey Ivanov <aivanov at openjdk.org> wrote:

> I wonder why the test is Windows-specific if it allows changing Look and Feels.
> 
> The only Look and Feel which ignores the background is Nimbus, other L&Fs on Windows at least paint the yellow and green background. As such, the test can be run on other platforms.
> 
> Was the original bug in Windows Look and Feel? If so, you may want to make it the default L&F.
> 
> The instructions don't mention anything about other Look and Feels. Does the tester have to verify each presented L&F?

I think the test was in windows which I might have retained the os type, will check and confirm once. The tester have to verify with each L&F for left margin check.

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PR: https://git.openjdk.java.net/jdk/pull/8721