<Swing Dev> RFR: 7124397: [macosx] JSpinner serialiazation - deserialization issue [v2]

[Sergey Bylokhov]

> The serialization was broken because different listeners are leaked in the case of compound components. 
> That listeners also caused memory leaks which were fixed by a few fixes here and there, and in jdk16 the serialization start to work fine. But I would like to contribute the test which will prove that serialization works fine.

Sergey Bylokhov has updated the pull request incrementally with one additional commit since the last revision:

  the summary is added to the test

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/989/files
  - new: https://git.openjdk.java.net/jdk/pull/989/files/061014c4..14615927

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=989&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=989&range=00-01

  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/989.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/989/head:pull/989

PR: https://git.openjdk.java.net/jdk/pull/989