[jdk20] RFR: 8299077: [REDO] JDK-4512626 Non-editable JTextArea provides no visual indication of keyboard focus [v2]

[Alexander Zuev]

> Slightly updated original fix - got rid of the extra flasher reset. Tests are fixed to be more stable and pass on the corresponding platforms.

Alexander Zuev has updated the pull request incrementally with one additional commit since the last revision:

  Simplifying the two nested if conditions into one.

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Changes:
  - all: https://git.openjdk.org/jdk20/pull/68/files
  - new: https://git.openjdk.org/jdk20/pull/68/files/e55fbbad..03788c9a

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk20&pr=68&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk20&pr=68&range=00-01

  Stats: 5 lines in 1 file changed: 0 ins; 2 del; 3 mod
  Patch: https://git.openjdk.org/jdk20/pull/68.diff
  Fetch: git fetch https://git.openjdk.org/jdk20 pull/68/head:pull/68

PR: https://git.openjdk.org/jdk20/pull/68