[jfx17u] RFR: 8291908: VirtualFlow creates unneeded empty cells

[Johan Vos]

clean backport of 8291908: VirtualFlow creates unneeded empty cells
Reviewed-by: kcr, aghaisas

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Commit messages:
 - 8291908: VirtualFlow creates unneeded empty cells

Changes: https://git.openjdk.org/jfx17u/pull/116/files
 Webrev: https://webrevs.openjdk.org/?repo=jfx17u&pr=116&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8291908
  Stats: 40 lines in 3 files changed: 38 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jfx17u/pull/116.diff
  Fetch: git fetch https://git.openjdk.org/jfx17u pull/116/head:pull/116

PR: https://git.openjdk.org/jfx17u/pull/116