RFR: 8375444: MenuButton - textTruncated Property is always false [v4]

[Florian Kirmaier]

> For MenuButton and SplitMenuButton the textTruncated Property is always false - but the text is correctly rendered truncated if it is to long.
> 
> This PR fixes it, by extending the logic in LabeledImpl - to always forward this property.
> I've also extended the existing tests for the truncated property.
> 
> It would be great, to get some feedback on how i fixes the bug.

Florian Kirmaier has updated the pull request incrementally with one additional commit since the last revision:

  JDK-8375444
  Removed commented out print statements.
  Fixed import order.

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

Changes:
  - all: https://git.openjdk.org/jfx/pull/2040/files
  - new: https://git.openjdk.org/jfx/pull/2040/files/4f7416ae..6f78c578

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jfx&pr=2040&range=03
 - incr: https://webrevs.openjdk.org/?repo=jfx&pr=2040&range=02-03

  Stats: 9 lines in 2 files changed: 1 ins; 8 del; 0 mod
  Patch: https://git.openjdk.org/jfx/pull/2040.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/2040/head:pull/2040

PR: https://git.openjdk.org/jfx/pull/2040