RFR: 8354472: Clean up and open source KeyEvent related tests (Part 3) [v3]

[Alexander Zuev]

> Clean up and publish five more KeyEvent related tests.

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

  Move middleOf calls to EDT.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/24764/files
  - new: https://git.openjdk.org/jdk/pull/24764/files/a26a22e9..d3b38f66

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=24764&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=24764&range=01-02

  Stats: 4 lines in 1 file changed: 1 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/24764.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24764/head:pull/24764

PR: https://git.openjdk.org/jdk/pull/24764