[jdk11u-dev] RFR: 8273638: javax/swing/JTable/4235420/bug4235420.java fails in GTK L&F

[Goetz Lindenmaier]

I backport this for parity with 11.0.15-oracle.

Required follow-up of JDK-8258554.

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Depends on: https://git.openjdk.java.net/jdk11u-dev/pull/721

Commit messages:
 - Backport 6cf70f5f0809276904094bf8eba8786892bf034e

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/722/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=722&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8273638
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/722.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/722/head:pull/722

PR: https://git.openjdk.java.net/jdk11u-dev/pull/722