RFR: 8242616: Regression: RTL - TextField Cursor Movement Via Keyboard [v2]

[Karthik P K]

> The old logic for cursor movement was buggy when both RTL and LTR text was present in the TextField. Used character BreakIterator instead of finding the character index using hitTest.
> 
> Added system test to validate the fix.

Karthik P K has updated the pull request incrementally with one additional commit since the last revision:

  Address review coments

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Changes:
  - all: https://git.openjdk.org/jfx/pull/1222/files
  - new: https://git.openjdk.org/jfx/pull/1222/files/15e8da98..bfa0f879

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jfx&pr=1222&range=01
 - incr: https://webrevs.openjdk.org/?repo=jfx&pr=1222&range=00-01

  Stats: 90 lines in 1 file changed: 82 ins; 0 del; 8 mod
  Patch: https://git.openjdk.org/jfx/pull/1222.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1222/head:pull/1222

PR: https://git.openjdk.org/jfx/pull/1222