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

[Phil Race]

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.

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