Windows 11 - Those pesky rounded corners

[Kmpopppe]

What steps will reproduce the problem?

1. Use JOSM launcher to launch the latest stable release after upgrading to Windows 11

What is the expected result?

Menu entries should be highlighted completely

What happens instead?

Menu entry highlight follows the OS-wide "rounded corners" behaviour and thus looks really strange.

Please provide any additional information below. Attach a screenshot if possible.

Firefox (currently using 98.0) manages to have menu entry highlighting in square-form, so there ought to be a way to programmatically force this behaviour, even under Windows 11.

URL:https://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2022-03-06 10:38:55 +0100 (Sun, 06 Mar 2022)
Build-Date:2022-03-07 02:31:09
Revision:18387
Relative:URL: ^/trunk

Identification: JOSM/1.5 (18387 en_GB) Windows 11 64-Bit
OS Build number: Windows 10 Pro 2009 (22000)
Memory Usage: 865 MB / 7241 MB (716 MB allocated, but free)
Java version: 1.8.0_321-b07, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Look and Feel: com.sun.java.swing.plaf.windows.WindowsLookAndFeel
Screen: \Display0 1920×1080 (scaling 1.00×1.00)
Maximum Screen Size: 1920×1080
Best cursor sizes: 16×16→32×32, 32×32→32×32
System property file.encoding: Cp1252
System property sun.jnu.encoding: Cp1252
Locale info: en_GB
Numbers with default locale: 1234567890 -> 1234567890
VM arguments: [-Djava.security.manager, -Djava.security.policy=file:<java.home>\lib\security\javaws.policy, -DtrustProxy=true, -Djnlpx.home=<java.home>\bin, -Djnlpx.origFilenameArg=%UserProfile%\AppData\LocalLow\Sun\Java\Deployment\cache\6.0\56\1ee8cfb8-5fd7ddc6, -Djnlpx.remove=false, -Djava.util.Arrays.useLegacyMergeSort=true, -Djnlpx.splashport=54345, -Djnlp.application.href=https://josm.openstreetmap.de/download/josm.jnlp, -Djnlpx.jvm=<java.home>\bin\javaw.exe]
Dataset consistency test: No problems found

Plugins:
+ DirectDownload (35893)
+ notesolver (0.3.3)
+ utilsplugin2 (35893)

Last errors/warnings:
- 00007.641 W: Unable to request certificate of https://roottest-g3.pkioverheid.nl
- 00008.605 W: Unable to request certificate of https://roottest-g3.pkioverheid.nl
- 00013.715 W: java.nio.file.FileSystemException: %UserProfile%\AppData\Local\Temp\josm_exec_powershell_660736094689018128.txt: Der Prozess kann nicht auf die Datei zugreifen, da sie von einem anderen Prozess verwendet wird.
- 00013.715 W: Unable to request certificate of https://grca.nat.gov.tw
- 00022.682 W: Region [TMS_BLOCK_v2] : Problem verifying disk.

[Kmpopppe]

"Imagery" menu showing the menu highlighting being messed up by rounded corners.

[stoecker]

That's either a Java or a Java Look&Feel issues, but nothing for JOSM.