In Ubuntu 18.04.1, I would like to use my left Super-key only to simply open the Show Applications menu (aka Dash) like a left click on the dock-icon (with the 9 dots) does and preferably close it again without showing me any open programs.
I can open it with Super + A and even close it again with Super R, but Super L appears to do nothing at all.
In Xfce, something similar was possible by adding a custom keyboard shortcut for Super L and setting the command to
xfce4-popup-whiskermenu, which would open and close a menu with favourite applications. Unfortunately, I don't know the command that opens and closes the Show Applications menu.
Is there any way to add such a shortcut in the new Gnome Shell?