I've found multiple guides (e.g. this) detailing how to map the "Overview of all windows" onto the Super key. I've used following approach:
gsettings set org.gnome.mutter overlay-key "'Super_L'" gsettings set org.pantheon.desktop.gala.behavior overlay-action "'xdotool key super+w'"
But when I have the window overview open, then I can't close it again with the Super key.
This is unlike the behaviour of the actual keyboard command (super+w) which opens the overview on the first tap and closes on the second.
How can I achieve this functionality on ONLY the super key?