[jfx25] RFR: 8367602: Regression: TabPane with wrapped label calculates wrong initial size

[John Hendrikx]

8367602: Regression: TabPane with wrapped label calculates wrong initial size

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Commit messages:
 - Backport 7e692bd0a577b13a40414adc3ba2a18e02855a40

Changes: https://git.openjdk.org/jfx/pull/1908/files
  Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1908&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8367602
  Stats: 11 lines in 1 file changed: 9 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jfx/pull/1908.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1908/head:pull/1908

PR: https://git.openjdk.org/jfx/pull/1908