[feat](trx-frontend-http): reorder the controls tray sections

The radio's own settings now come first, then audio, then the scheduler:
Advanced radio controls, Audio controls, Scheduler controls.

The advanced section is not in the markup — ui-core builds it at runtime
and gathers the SDR settings, virtual channel and TX limit rows into it,
appending the result, which put it last however the markup was ordered.
It is inserted ahead of the audio section instead.

The signal readout and the TX meters stay where they are, between the
controls and the sections: they are readouts rather than a section, and
on an SDR the spectrum covers them anyway.

Signed-off-by: Stan Grams <sjg@haxx.space>

src/trx-client/trx-frontend/trx-frontend-http/assets/web/generated/app.js

@@ -743,7 +743,7 @@ function elementById(id) {
         const element = document.getElementById(id);
         if (element) body.appendChild(element);
       });
-      tray.appendChild(details);
+      tray.insertBefore(details, document.getElementById("audio-controls"));
       api.applyLayout(savedLayoutName(), { persist: false });
     }
   }