When viewing a message by double-clicking on its line in the message list, close the message window with escape as well as ctrl-W. STEPS TO REPRODUCE 1. Navigate to any folder. 2. Double-click on a message in the folder; a window opens to display the message (read-only). OBSERVED RESULT The window can only be closed with ctrl-W (or clicking close in the title bar). EXPECTED RESULT The window can also be closed with ESC, like the view-source window when pressing V in the message list instead of double-clicking. SOFTWARE/OS VERSIONS Kmail Version 5.19.3 (21.12.3) openSUSE Leap 15.4