For Windows and GTK L&F, mnemonic is visible when ALT key is pressed. Test instruction updated to reflect the desired behaviour .
------------- Commit messages: - Test instruction update Changes: https://git.openjdk.org/jdk/pull/26546/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26546&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8361298 Stats: 9 lines in 1 file changed: 6 ins; 0 del; 3 mod Patch: https://git.openjdk.org/jdk/pull/26546.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/26546/head:pull/26546 PR: https://git.openjdk.org/jdk/pull/26546
