Add a view that shows a single row, with values above and messages below

[jamesaoverton]

It's good to be able to see multiple rows with errors highlighted (#14), but sometimes popovers/mouseovers are annoying.

It would be good to have an option to "zoom in" on a single row and see all the messages at once. We would have a table with the usual columns, where the first row contains all the values with highlighting as in #14. Below this would be a second row showing all the messages. This would give a quick overview of all the messages for a row.

With the example SQL from #14, this single-row view would look something like:

subject	weight
subject:3	11g
	ERROR: Must be a number