[jfx11u] RFR: 8293795: [Accessibility] [Win] [Narrator] Exceptions When Deleting Text with Continuous Key Press in TextArea and TextField

[Ambarish Rapte]

Clean backport, Verified on Mac and Windows

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Commit messages:
 - 8293795: [Accessibility] [Win] [Narrator] Exceptions when deleting text with continous key press in TextArea and TextField

Changes: https://git.openjdk.org/jfx11u/pull/122/files
 Webrev: https://webrevs.openjdk.org/?repo=jfx11u&pr=122&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8293795
  Stats: 25 lines in 1 file changed: 15 ins; 5 del; 5 mod
  Patch: https://git.openjdk.org/jfx11u/pull/122.diff
  Fetch: git fetch https://git.openjdk.org/jfx11u pull/122/head:pull/122

PR: https://git.openjdk.org/jfx11u/pull/122