RFR: 8276849: Refresh the window icon on graphics configuration changes [v4]

[Alexey Ivanov]

On Wed, 23 Feb 2022 21:34:29 GMT, Emmanuel Bourg <duke at openjdk.java.net> wrote:

>> Emmanuel Bourg has updated the pull request incrementally with two additional commits since the last revision:
>> 
>>  - Test case for the window icon update on DPI change (Java generic font names are usually capitalized)
>>  - Test case for the window icon update on DPI change (dispose the frame after a timeout on the EDT)
>
> Just tested on macOS 12 with a non Retina screen and OpenJDK 8: the icon displayed in the dock when the test frame is minimized is the 32x32 one. If I add more icons to the list, it picks the biggest one, up to 128x128. Bigger icons are ignored.
> 
> The issue observed on Windows doesn't really transpose to macOS, I think I'll revert the change to `LWWindowPeer`.

> @ebourg @aivanov-jdk are the remaining issues test issues, or might there still be product issues ? No pressure to push but let's not forget about it either.

Windows side looks reasonable to me. The window updates the icon when it's dragged from one monitor to another with different scale.

macOS changes have been reverted.

I couldn't see the icon updates on Linux. Should the changes for Linux be reverted too?

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PR: https://git.openjdk.java.net/jdk/pull/6180