Make the Luma Dashboard photos smaller

Please could the photos on the dashboard for an event be a bit smaller? This is on a Windows laptop using a browser. Takes forever to scroll through to find a photo that needs deleting.

(On another point, it's similar from a browser on a phone too, but once you've selected photos to delete you have to scroll all the way to the top for the delete button - can there be a floating delete button for mobile browsers?)

Thanks