[jfx22u] RFR: 8330462: StringIndexOutOfBoundException when typing anything into TextField

[Ambarish Rapte]

The backport is almost clean.
While cherry picking the mainline commit, a minor merge conflict was shown in a the file `tests/system/src/test/.classpath` : The mainline file has a few additional exports compared to 22u.

Test passes on windows.

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Commit messages:
 - 8330462: StringIndexOutOfBoundException when typing anything into TextField

Changes: https://git.openjdk.org/jfx22u/pull/28/files
  Webrev: https://webrevs.openjdk.org/?repo=jfx22u&pr=28&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8330462
  Stats: 147 lines in 5 files changed: 142 ins; 0 del; 5 mod
  Patch: https://git.openjdk.org/jfx22u/pull/28.diff
  Fetch: git fetch https://git.openjdk.org/jfx22u.git pull/28/head:pull/28

PR: https://git.openjdk.org/jfx22u/pull/28