[jdk21u-dev] RFR: 8185429: [macos] After a modal dialog is closed, no window becomes active [v2]

[Satyen Subramaniam]

> Backporting JDK-8185429: [macos] After a modal dialog is closed, no window becomes active. Add a check for previous focused window on modal unblocking. If the owner of a closing dialog was the last focused window, then the owner of the dialog should regain focus. Removing relevant test from problem list. Ran GHA Sanity Checks, local Tier 1 and 2, and adjusted test directly. Patch is clean. Backporting for parity with Oracle.

Satyen Subramaniam has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains two additional commits since the last revision:

 - Merge branch 'openjdk:master' into 8185429
 - Backport 3a26bbcebc2f7d11b172f2b16192a3adefeb8111

-------------

Changes:
  - all: https://git.openjdk.org/jdk21u-dev/pull/2021/files
  - new: https://git.openjdk.org/jdk21u-dev/pull/2021/files/2d4d7f27..d028fcd6

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=2021&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=2021&range=00-01

  Stats: 14104 lines in 216 files changed: 7450 ins; 5886 del; 768 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/2021.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/2021/head:pull/2021

PR: https://git.openjdk.org/jdk21u-dev/pull/2021