[jdk20] RFR: 4512626: Non-editable JTextArea provides no visual indication of keyboard focus [v3]

[Alexander Zuev]

> Set the text caret to be visible but not blinking on the non-editable text area. Fix the regression test that becames unstable after the change.

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

  Handle different cases where refresh rate can be set when component is in different states causing some confused result.
  Also added code that in case of non-editable text component reports the saved blink rate to avoid any problems with JCK testing.

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Changes:
  - all: https://git.openjdk.org/jdk20/pull/21/files
  - new: https://git.openjdk.org/jdk20/pull/21/files/70da8f6a..3b9d9cfe

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk20&pr=21&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk20&pr=21&range=01-02

  Stats: 21 lines in 1 file changed: 18 ins; 1 del; 2 mod
  Patch: https://git.openjdk.org/jdk20/pull/21.diff
  Fetch: git fetch https://git.openjdk.org/jdk20 pull/21/head:pull/21

PR: https://git.openjdk.org/jdk20/pull/21