At the very least I'd like a menu on each table column that lets me select sort-asc v.s. sort-desc without having to click twice.

I'd also like to be able to indicate that a column should be used for faceting (possibly only for columns that are not floating point and do not have a unique index on them).

This needs to be built with accessibility in mind - I don't want screenreaders to read out the contents of a menu as the "th" label for any given cell.

Related: #690