Change layout of Course List block's grid view

[donnapep]

Is your feature request related to a problem? Please describe

On themes with a narrow page width like TT4, the Course List block doesn't look good for grid view:

Describe the solution you'd like

Move the CTA to the bottom of the Course List block cards for grid view so that the content can fill the card.

I suspect we didn't implement grid view to spec originally because it wasn't possible to use CSS to then move the buttons to the right side for list view. If that's the case, we should try to find some compromise where both views look good.

Design