So after my last Debian Unstable upgrade, I am now running KDE Plasma 6 as my desktop. KDE Plasma, by default, brings up its application menu if you press and release what it calls the “Meta” (more commonly “Super” or “Windows”) modifier key. I have this disabled because I use Meta/Super instead of Alt as the modifier key for moving windows around; and I did that switch to avoid interfering with the use of the Alt-click function in Blender. Previously, I did this change to Meta/Super behaviour by editing a config file called ~/.config/kwinrc. But now, this has been unified with the rest of the system settings, and can be controlled through the same interface <https://www.lorenzobettini.it/2024/06/modifier-only-shortcuts-in-kde-plasma-6-1/> (excuse the ads).