Responsive Table Question

[crshnbrn66]

Subject of the issue

I want to force the browser to show the rolled up items in a list I have.
Such that I have a list of two items in a row I only want the first item to show and the second item to only show when the + is clicked.

This behavior works when resizing the browser window. I'd like it to be a default though. How do you override the css behavior to get the desired result?

[crshnbrn66]

wrong repo cancelling