Stalled torrents have time=0 (infinite/never), which raw numeric sort
places between negative (completed) and positive (active) values.
Add a custom sortingFn on the time column that maps 0 to Infinity so
stalled entries always sort last in ascending order and first in
descending order.
Closes#5416
Co-authored-by: Matt Van Horn <455140+mvanhorn@users.noreply.github.com>