RFR: 8315655: [macos] Right click and dragging over a component with a popup menu will open the popup [v8]

[Alisen Chung]

> Issue is a mouse drag will trigger a popup in macos, but not in linux or windows.
> The solution is to add a check for a mouse pressed event to show popup and prevent mouse entered events from triggering the popup

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

  fix jtreg summary, group volatile vars together

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Changes:
  - all: https://git.openjdk.org/jdk/pull/19569/files
  - new: https://git.openjdk.org/jdk/pull/19569/files/06a7c212..c24a6429

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=19569&range=07
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=19569&range=06-07

  Stats: 3 lines in 1 file changed: 1 ins; 1 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/19569.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19569/head:pull/19569

PR: https://git.openjdk.org/jdk/pull/19569