[jdk21u-dev] RFR: 8256289: java/awt/Focus/AppletInitialFocusTest/AppletInitialFocusTest1.java failed with "RuntimeException: Wrong focus owner: java.awt.Button[button1,41,36,56x23,label=Button1]"

[Goetz Lindenmaier]

I backport this for parity with 21.0.11-oracle.

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Commit messages:
 - Backport 21c985f2d75401fd81fa5eaf1486b0be60246962

Changes: https://git.openjdk.org/jdk21u-dev/pull/2620/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=2620&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8256289
  Stats: 293 lines in 5 files changed: 146 ins; 147 del; 0 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/2620.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/2620/head:pull/2620

PR: https://git.openjdk.org/jdk21u-dev/pull/2620