IMO, this should be behind the % if about_page_editable, as I see it currently implemented.

I sense is that the existing logic is right. If the MKTG_SITE_ENABLED = False, then this should field should show. It might cause a bit of confusion on Edge, since Edge does not expose a course catalog.

Note that Microsites *do* expose a course catalog (aka the legacy homepage), so this PR would be very helpful in that regard. Right now, I have to manipulate the database to get the short description on-hover content to work correctly.