RFR: 8335547: Support multi-line prompt text for TextArea

[Michael Strauß]

On Wed, 19 Feb 2025 16:50:02 GMT, Ziad El Midaoui <duke at openjdk.org> wrote:

> 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

What happens if the text contains line breaks other than `\n`, such as `\r` or `\r\n`? There's `System.lineSeparator()`, but we might want to remove all kinds of line separators regardless.

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PR Comment: https://git.openjdk.org/jfx/pull/1716#issuecomment-2727285120