RFR: 8378197: Remove AppContext from sun/swing/plaf/DesktopProperty.java [v2]

[Phil Race]

> A straightforward removal of a per-AppContext flag which can now be static

Phil Race has updated the pull request incrementally with one additional commit since the last revision:

  8378197

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Changes:
  - all: https://git.openjdk.org/jdk/pull/29801/files
  - new: https://git.openjdk.org/jdk/pull/29801/files/b404e83e..5daf3547

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=29801&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=29801&range=00-01

  Stats: 24 lines in 1 file changed: 2 ins; 19 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/29801.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/29801/head:pull/29801

PR: https://git.openjdk.org/jdk/pull/29801