Clicking one tuned the rig and zoomed the panadapter, and stopped there:
no mode on the entry, no RST preset, no park or summit reference, and —
the one that matters — no word to the decoding application. So picking
an FT4 station from Chase new while WSJT-X sat in FT8 left it decoding
FT8, which defeats the only thing the window is for.
It goes through handleSpotClick now rather than repeating a chosen half
of it, so the two can never drift apart again. The mode is handed over
where a cluster line would carry it in its comment, which is where that
handler looks for it.