[jdk11u-dev] RFR: 8320079: The ArabicBox.java test has no control buttons

[Andrew Lu]

I backport this for parity with 11.0.25-oracle.
Text Blocks is modified due to not supported in 11.

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Commit messages:
 - Backport 792fc9d114977664da0b3bebf0f1d82360d375b6

Changes: https://git.openjdk.org/jdk11u-dev/pull/2790/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2790&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8320079
  Stats: 98 lines in 1 file changed: 98 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2790.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2790/head:pull/2790

PR: https://git.openjdk.org/jdk11u-dev/pull/2790