RFR: 8253935: [testbug] ComboBoxTest.testEditorKeyInputsWhenPopupIsShowing fails on Mac, Linux [v2]

[Ambarish Rapte]

> The test fails on Mac and Linux.
> Cause of failure:
> - Linux: Unlike Windows, on Linux CTRL + Arrow keys move the caret to end/beginning of current word and not to
>   beginning/end of next word.
> - Mac: On Mac correct keys to traverse through words is ALT + Arrow and not CTRL + Arrow. And like on Linux, ALT + Arrow
>   keys move the caret to end/beginning of current word and not to beginning/end of next word.
> 
> Fix is to use correct keys and asserts according to platform.

Ambarish Rapte has updated the pull request incrementally with one additional commit since the last revision:

  review update

-------------

Changes:
  - all: https://git.openjdk.java.net/jfx/pull/317/files
  - new: https://git.openjdk.java.net/jfx/pull/317/files/da40fe41..7347a4dd

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jfx&pr=317&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jfx&pr=317&range=00-01

  Stats: 33 lines in 2 files changed: 7 ins; 18 del; 8 mod
  Patch: https://git.openjdk.java.net/jfx/pull/317.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/317/head:pull/317

PR: https://git.openjdk.java.net/jfx/pull/317