tables should be rendered more compactly in css

[jowens]

e.g.: https://gunrock.github.io/docs/#/analysis/gunrock_primitives_dobfs_mteps_best_table

By default I think they want to be a lot smaller. They are typeset in large type and so we can't fit them on a reasonably wide screen. We're still not going to be able to fit the wide ones, but the more compact this is, the better, I think.

Very low priority.