RFR: 8342233: Regression: TextInputControl selection is backwards in RTL mode

[Andy Goryachev]

A fix for [JDK-8319844](https://bugs.openjdk.org/browse/JDK-8319844) Text/TextFlow.hitTest() introduced a regression in the `TextArea`/`TextField`/`PasswordField` in the RTL mode.

The fix is to flip the x coordinates when needed in the `TextAreaSkin`/`TextFieldSkin`.

The RTL node orientation also breaks navigation using keyboard arrow keys, but that's a different issue: [JDK-8296266](https://bugs.openjdk.org/browse/JDK-8296266).

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I tried to devise a headful test, but it is currently blocked by [JDK-8189167](https://bugs.openjdk.org/browse/JDK-8189167)

The fix can be tested manually using the Monkey Tester, with the headful test to be added probably as a part of [JDK-8326869](https://bugs.openjdk.org/browse/JDK-8326869) .

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Commit messages:
 - linux
 - take a screenshot
 - test
 - review comments
 - Merge remote-tracking branch 'origin/master' into ag.rtl.regression
 - whitespace
 - test
 - cleanup
 - Merge remote-tracking branch 'origin/master' into ag.rtl.regression.2
 - Merge remote-tracking branch 'origin/8342462.text.area.skin.cleanup' into ag.rtl.regression.2
 - ... and 6 more: https://git.openjdk.org/jfx/compare/3a8a5598...a4f295a3

Changes: https://git.openjdk.org/jfx/pull/1609/files
  Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1609&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8342233
  Stats: 610 lines in 8 files changed: 559 ins; 23 del; 28 mod
  Patch: https://git.openjdk.org/jfx/pull/1609.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1609/head:pull/1609

PR: https://git.openjdk.org/jfx/pull/1609