RFR: 8283509: Invisible menus can lead to IndexOutOfBoundsException [v2]

[Robert Lichtenberger]

> findSibling adapted to only use visible menus when calculating the
> index.

Robert Lichtenberger has updated the pull request incrementally with one additional commit since the last revision:

  8251480: TableColumnHeader: calc of cell width must respect row styling
  
  Comment improved.

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Changes:
  - all: https://git.openjdk.java.net/jfx/pull/759/files
  - new: https://git.openjdk.java.net/jfx/pull/759/files/2198d6bf..6d511a3f

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jfx&pr=759&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jfx&pr=759&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jfx/pull/759.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/759/head:pull/759

PR: https://git.openjdk.java.net/jfx/pull/759