Comments should be searchable

Summary: This is clearly desireable, but hard, so it's not clear when it will be done.

The underlying issue is that comments are only loaded on-demand (to help keep memory footprint under control), so we can't just search the Space the way we do the Space content.

The correct solution is to implement a much realer search engine under the hood, which keeps all of the Space's data in a properly searchable format. That would make Querki search much better in many ways, but it's a lot of work.

A partial temporary solution would be to make Querki Spaces work with, eg, Google. That would only help for public Spaces, but it would at least help a bit.