How do I remove the Users column from the "front page" overview listing

How do I remove the Users column from the “front page” overview listing.

The coloured circles seems to serve little purpose and i’d rather have the
screen real esate added into the Subject area, so that less of those wrap,
thereby giving me more view in my overview

Actually, I should generalise that and ask, “How do I customise the
front page” ?

I’d also be interested in getting Discourse to send out email in plain text, as
I have just seen it arrive in my email client as HTML but that’s probably one
for another Category: or maybe another Topic ?