A board level switch, off by default. With it on, each list puts its card
count on the add-card button. Useful to a board that is being kept to a size
and noise to one that is not, which is why it is a choice rather than always
on.
The count is every card in the list, not the ones a filter leaves visible.
Those answer different questions: how full is this list, versus how many match
what I am looking at right now. The first is the one a counter is for, and it
is also what the same switch counts in Pro, so a board keeps its meaning
across an upgrade.
The column matches Pro's name, type and default, so the setting survives that
upgrade rather than being dropped on the way.
Daniel Hiller