fix(icom): the live radio names MY_RIG, and a manual take records it too

Two halves of the same station confusion. The entry form pre-filled MY_RIG
from the per-band default on every band change, so the log-time priority (the
radio that is keying beats the radio that was planned) never ran — the field
was no longer empty by the time the backend looked. The form now asks the
active radio first, through a new ActiveRadioMyRig binding.

And the manual record button started its capture from the From-radio sound
card unconditionally, where the automatic recorder already knew a network
Icom's audio is pushed from the 50003 stream: a manual take on the IC-7760
was a faithful recording of the Flex's DAX. Same source rule for both, and
the button is offered with no sound card at all when the network stream is
the source.

frontend/wailsjs/go/main/App.d.ts

@@ -46,6 +46,8 @@ export function ActivateProfile(arg1:number):Promise<void>;
 
 export function ActiveRadioID():Promise<string>;
 
+export function ActiveRadioMyRig():Promise<string>;
+
 export function AddQSO(arg1:qso.QSO):Promise<number>;
 
 export function AmpFanMode(arg1:string,arg2:string):Promise<void>;

frontend/wailsjs/go/main/App.js

@@ -30,6 +30,10 @@ export function ActiveRadioID() {
   return window['go']['main']['App']['ActiveRadioID']();
 }
 
+export function ActiveRadioMyRig() {
+  return window['go']['main']['App']['ActiveRadioMyRig']();
+}
+
 export function AddQSO(arg1) {
   return window['go']['main']['App']['AddQSO'](arg1);
 }