fix(sat,decodes): the left column holds position too, and drift stops lying

Two things.

The sky plot and the position share the left column now, and the button
that opens it says so the way the right one does — it was a radar icon,
left over from when it toggled a plot inside the readout column, and the
gesture is the same one on both sides. The plot and the numbers are the
same answer at two precisions: azimuth and elevation drawn, then written
out to the digit. Having them at opposite ends of the window meant
reading a bearing off one side and finding it on the other.

And the band-drift warning, reported by W4TE. It compared the decoder's
announced band against RigState.Band, which is the TRANSMIT band — so
with slice A on 20 m running its own WSJT-X, slice B on 40 m, and
transmit focus on B, the 20 m decoder was told the rig was on 40 m while
the slice it listens to had been on 20 m throughout. The panel's own
comment had accepted this as a line that setup could read past; it is
worse than that, because the warning names a band and asserts something
false about the radio.

RigState now carries RxBands: every band the rig has a receiver on. One
entry on a single-VFO rig, one per slice on a Flex, the transmit band
always included so it cannot come back empty while the rig is on a
frequency. The warning fires only when the decoder announces a band
NOTHING on the radio is on, which is what it was always for and what a
lost CAT link actually looks like.

frontend/src/lib/i18n.tsx

@@ -625,7 +625,7 @@ const en: Dict = {
   'sat.sideWidthTip': 'Drag to resize the readout. Double-click to reset it.',
   'sat.thSat': 'Satellite', 'sat.thAos': 'Rise', 'sat.thLos': 'Set', 'sat.thMaxEl': 'Max', 'sat.thIn': 'In',
   'sat.skyPlot': 'The pass across the sky — centre is straight up, the rim is the horizon, north is at the top',
-  'sat.showSky': 'Show the sky plot', 'sat.hideSky': 'Hide the sky plot',
+  'sat.showSky': 'Show the sky and position', 'sat.hideSky': 'Hide the sky and position',
   'sec.satellite': 'Satellites',
   'satset.hint': 'Where the antenna is, and the machine that points it. The satellites you follow and the frequency plan are in the Satellites tab.',
   'satset.gridPlaceholder': 'e.g. JN18cx',
@@ -1251,7 +1251,7 @@ const fr: Dict = {
   'sat.sideWidthTip': 'Glisser pour redimensionner le panneau. Double-clic pour le remettre par défaut.',
   'sat.thSat': 'Satellite', 'sat.thAos': 'Lever', 'sat.thLos': 'Coucher', 'sat.thMaxEl': 'Max', 'sat.thIn': 'Dans',
   'sat.skyPlot': 'Le passage dans le ciel — le centre est à la verticale, le bord est l’horizon, le nord en haut',
-  'sat.showSky': 'Afficher la vue du ciel', 'sat.hideSky': 'Masquer la vue du ciel',
+  'sat.showSky': 'Afficher le ciel et la position', 'sat.hideSky': 'Masquer le ciel et la position',
   'sec.satellite': 'Satellites',
   'satset.hint': 'Où se trouve l’antenne, et la machine qui la pointe. Les satellites suivis et le plan de fréquences sont dans l’onglet Satellites.',
   'satset.gridPlaceholder': 'ex. JN18cx',