RFR: 8139208: [macosx] Issue with setExtendedState of JFrame [v5]

[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:

  update test

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/15236/files
  - new: https://git.openjdk.org/jdk/pull/15236/files/b88dc114..50abf4bd

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15236&range=04
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15236&range=03-04

  Stats: 2 lines in 1 file changed: 2 ins; 0 del; 0 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