RFR: 8225777: java/awt/Mixing/MixingOnDialog.java fails on Ubuntu [v4]

[Sergey Bylokhov]

On Fri, 22 Apr 2022 17:52:20 GMT, Alexander Zvegintsev <azvegint at openjdk.org> wrote:

>> The test was failing due to it tried to place windows too close to left top corner, so they got shifted from the dock and top panel on Gnome.
>> 
>> Shifting all test windows fixes the issue.
>> 
>> 
>> Testing is green on all platforms.
>
> Alexander Zvegintsev has updated the pull request incrementally with one additional commit since the last revision:
> 
>   review comments

Marked as reviewed by serb (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/8326