restore column sorting

https://github.com/brain-score/brain-score.web/pull/45 disabled the sorting of tables by clicking on the benchmark name in favor of expand/contract. This should be easy to restore from a functional perspective, but we need to figure out the UX.

Start by reviewing pull request #45 and the table implementation it changed. Determine how benchmark-name clicks should support both sorting and expand/contract, then confirm the intended UX before changing behavior; done means the agreed interaction restores column sorting without losing expansion.

Written by the indexing model from the issue text.