A spot whose entity/band/mode is already worked, whose callsign isn't in the log,
and that carries no POTA/county/prefix novelty is dimmed (whole row, opacity) so
the eye skips it. "Nothing" follows the status, which already obeys the "same
slot" option and digital grouping. getRowStyle drives it; the spot-status effect
now redrawRows so the dimming re-applies when a status lands.