Not sure this helps anyone but I just found out something I had no idea would work based on the documentation for this great card. I have been playing around for the past few hours trying to get a simple tooltip to display on column headers.
I had no idea that the “name” can accept a simple HTML snippet.
So you can do this as a column definition:
- name: '<div title="Total Games Played">GP</div>'
And get this:
