RFR: 8139208: [macosx] Issue with setExtendedState of JFrame [v4]

[Alisen Chung]

> Swapped order of showing frame and managing extended frame state.

Alisen Chung has updated the pull request incrementally with one additional commit since the last revision:

  test update

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/15236/files
  - new: https://git.openjdk.org/jdk/pull/15236/files/5d488e2b..b88dc114

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15236&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15236&range=02-03

  Stats: 39 lines in 1 file changed: 13 ins; 6 del; 20 mod
  Patch: https://git.openjdk.org/jdk/pull/15236.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15236/head:pull/15236

PR: https://git.openjdk.org/jdk/pull/15236