Updates the `RichTextArea` code to use the new text layout APIs delivered in https://bugs.openjdk.org/browse/JDK-8341670
Also: - updates the "demo" model in the `RichTextAreaDemoApp` to show underline/strikethrough in the presence of `TextFlow` borders ------------- Commit messages: - 2026 - Merge branch 'master' into 8370902.new.api - Merge branch 'master' into 8370902.new.api - new api Changes: https://git.openjdk.org/jfx/pull/2012/files Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=2012&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8370902 Stats: 66 lines in 5 files changed: 14 ins; 26 del; 26 mod Patch: https://git.openjdk.org/jfx/pull/2012.diff Fetch: git fetch https://git.openjdk.org/jfx.git pull/2012/head:pull/2012 PR: https://git.openjdk.org/jfx/pull/2012
