[jfx18] RFR: 8282134: Certain regex can cause a JS trap in WebView

[Johan Vos]

Clean backport of 8282134: Certain regex can cause a JS trap in WebView
Reviewed-by: kcr, arapte

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Commit messages:
 - 8282134: Certain regex can cause a JS trap in WebView

Changes: https://git.openjdk.org/jfx/pull/835/files
 Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=835&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8282134
  Stats: 22 lines in 3 files changed: 21 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jfx/pull/835.diff
  Fetch: git fetch https://git.openjdk.org/jfx pull/835/head:pull/835

PR: https://git.openjdk.org/jfx/pull/835