Added missing RichTextArea styles to `caspian.css`. This is a trivial change.
To test, one can use the latest Monkey Tester Window -> Stylesheet menu. https://github.com/andy-goryachev-oracle/MonkeyTest <img width="1021" height="350" alt="Screenshot 2025-11-03 at 11 50 50" src="https://github.com/user-attachments/assets/8559e702-5294-4a98-a251-f3b2283d7a83"; /> ------------- Commit messages: - added rich text area styles to caspian.css Changes: https://git.openjdk.org/jfx/pull/1959/files Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1959&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8371080 Stats: 80 lines in 1 file changed: 79 ins; 0 del; 1 mod Patch: https://git.openjdk.org/jfx/pull/1959.diff Fetch: git fetch https://git.openjdk.org/jfx.git pull/1959/head:pull/1959 PR: https://git.openjdk.org/jfx/pull/1959
