Please review this Platforms tested: Windows 11, macOS, Linux, Ubuntu
Summary: Updated `PanelRepaint` to use `BorderLayout` for the test frame and its main panel instead of relying on `FlowLayout` with manually assigned bounds. - [x] I confirm that I make this contribution in accordance with the [OpenJDK Interim AI Policy](https://openjdk.org/legal/ai). ------------- Commit messages: - removing bugid - [TEST_BUG] closed/java/awt/Dialog/FileDialogUserFilterTest/FileDialogUserFilterTest.html failed on all platforms Changes: https://git.openjdk.org/jdk/pull/31687/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=31687&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8364354 Stats: 10 lines in 1 file changed: 2 ins; 3 del; 5 mod Patch: https://git.openjdk.org/jdk/pull/31687.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/31687/head:pull/31687 PR: https://git.openjdk.org/jdk/pull/31687
