RFR: 8335547: Support multi-line prompt text for TextArea [v4]

[Ziad El Midaoui]

> Added multi line prompt support for TextArea this will provide the ability to have multiple lines in textArea as expected,
> Also fixed tests to meet the new changes

Ziad El Midaoui has updated the pull request incrementally with one additional commit since the last revision:

  Removed unused imports and code

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Changes:
  - all: https://git.openjdk.org/jfx/pull/1716/files
  - new: https://git.openjdk.org/jfx/pull/1716/files/549c1997..4364489c

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jfx&pr=1716&range=03
 - incr: https://webrevs.openjdk.org/?repo=jfx&pr=1716&range=02-03

  Stats: 2 lines in 1 file changed: 0 ins; 2 del; 0 mod
  Patch: https://git.openjdk.org/jfx/pull/1716.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1716/head:pull/1716

PR: https://git.openjdk.org/jfx/pull/1716