When I increase the zoom/text size, the actions menu wraps, which causes a loss of the space along the top of the screen, due the the grid layout:
 
I think a good solution would be to switch to a two-column layout; then the actions menu wrapping wouldn't affect the rest of the page to the right.
I'd be happy to make a PR, if you agree that this would improve the layout, and not cause problems on any other pages.