In my Ubuntu 16.04 Xenial xerus, the option was at: org -> gnome -> desktop -> wm -> preferences Kudos on explaining about the colon issue, I changed from appmenu:close to close:appmenu and it moved to the left as I wanted.
In my Ubuntu 16.04 Xenial xerus, the option was at: org -> gnome -> desktop -> wm -> preferences
Kudos on explaining about the colon issue, I changed from appmenu:close to close:appmenu and it moved to the left as I wanted.