Make the run switch a switch, and split the tuning tolerance by mode

Three things you could not see or could not set.

Run and S&P were a label saying which one you were in. They are two buttons
now, the one you are in marked, either one clickable, which is what N1MM has.
Ctrl+? and F1 still work.

The tuning tolerance is one number per mode, as N1MM keeps it: CW, phone and
digital, 300 Hz each, which are its defaults. A phone signal is wide and a CW
one is not, so one number for both was wrong.

The bearing line went blank whenever it could not be worked out, which looks
exactly like a missing feature. It now says which end could not be placed and
what to do — no country file, no position for your own station, or a callsign
the country file does not place. It also gives miles beside the kilometres, as
N1MM does.

While clicking it: a marked button lost its mark under the pointer, because the
theme paints its own background there. The band buttons had the same fault.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src/Nonemm.App/Windows/EntryWindow.CallFrame.cs

@@ -20,8 +20,12 @@ public sealed partial class EntryWindow
     /// one, and neither is nothing.
     private string framedCall = "";
 
+    /// How close counts as sitting on a spot, which is a different number for
+    /// each mode: a phone signal is wide and a CW one is not.
     private Frequency TuningTolerance =>
-        Frequency.FromHertz(Math.Max(0, session.Settings.TuningToleranceHertz));
+        Frequency.FromHertz(Math.Max(
+            0,
+            session.Settings.TuningToleranceFor(Logging?.Mode.Category ?? ModeCategory.Cw)));
 
     private void ShowCallFrame()
     {