Handle counts better for free-form text questions

For comment-style free-form text responses, show if there was a response or not. We assume each answer could be unique, so there's no point in coloring based on the actual answer.

We still need some API support to handle photo-response counts, but then the dashboard change should be easy.

The wording is not amazing, but it's consistent and makes for a quick change. We can play with it.

/cc @hampelm