[jdk21u] RFR: 8365389: Remove static color fields from SwingUtilities3 and WindowsMenuItemUI

Thu Sep 25 10:17:08 UTC 2025

I'd like to bring this late to 21 to assure the regression introduced by [JDK-8348760](https://bugs.openjdk.org/browse/JDK-8348760) doesn't get into the product.
Unfortunately the follow-up change [JDK-8365625](https://bugs.openjdk.org/browse/JDK-8365625) is not yet pushed.
Also, OpenJDK 21 will be ahead of OpenJDK 25, as I doubt this change will make it to 25.0.1.

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Commit messages:
 - Backport 3468c6e5ef7e7592cf9484736ce333fbe0eaf34d

Changes: https://git.openjdk.org/jdk21u/pull/470/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u&pr=470&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8365389
  Stats: 78 lines in 6 files changed: 14 ins; 50 del; 14 mod
  Patch: https://git.openjdk.org/jdk21u/pull/470.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u.git pull/470/head:pull/470

PR: https://git.openjdk.org/jdk21u/pull/470