[jdk21u-dev] RFR: 8354646: java.awt.TextField allows to identify the spaces in a password when double clicked at the starting and end of the text

[Goetz Lindenmaier]

I backport this for parity with 21.0.10-oracle.

Resolved copyright, probably clean anyways.

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Commit messages:
 - backport 8d33ea7395e5dd504b899d8972617f6696546d84

Changes: https://git.openjdk.org/jdk21u-dev/pull/2256/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=2256&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8354646
  Stats: 149 lines in 5 files changed: 110 ins; 34 del; 5 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/2256.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/2256/head:pull/2256

PR: https://git.openjdk.org/jdk21u-dev/pull/2256