[jdk21u-dev] RFR: 8334509: Cancelling PageDialog does not return the same PageFormat object

[Goetz Lindenmaier]

I backport this for parity with 21.0.10-oracle.

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Commit messages:
 - Backport 689cee3d0950e15e88a1f6738bfded00655dca9c

Changes: https://git.openjdk.org/jdk21u-dev/pull/2424/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=2424&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8334509
  Stats: 67 lines in 2 files changed: 60 ins; 0 del; 7 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/2424.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/2424/head:pull/2424

PR: https://git.openjdk.org/jdk21u-dev/pull/2424