Hidden from the filter panel and forced off, without touching the machinery
behind them — it is correct and took several rounds to get right, so it stays
whole.
One flag in lib/spotDisplay does both jobs: readSpotDisplayOptions answers
false while it is down, which covers the band map, and App.tsx seeds its two
states from that same call instead of reading localStorage directly. Without
that second half an operator who already had "No colour on worked" saved would
have kept it applied with no switch left to turn it off.
The saved preferences are deliberately left in localStorage rather than
cleared, so whoever had either option on gets their choice back the day the
switches return instead of silently starting from off.
rouggy
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