RFR: 8089134: [2D traversal, RTL] TraversalEngine only handles left/right key traversal correctly in RTL for top-level engine in ToolBar

[Ajit Ghaisas]

**Issue**
https://bugs.openjdk.java.net/browse/JDK-8089134

**Fix**
Added a fix to modify selection direction based on NodeOrientation of the ToolBar.

**Testing**
Added a unit test to test common focus movement scenarios using tab and arrow keys for the ToolBar.

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Commit messages:
 - whitespace_removal
 - toolbar_rtl_focus_fix

Changes: https://git.openjdk.java.net/jfx/pull/144/files
 Webrev: https://webrevs.openjdk.java.net/jfx/144/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8089134
  Stats: 348 lines in 2 files changed: 348 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jfx/pull/144.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/144/head:pull/144

PR: https://git.openjdk.java.net/jfx/pull/144