Clean up logic consistency

This was done before because we were floundering with how to detect submenus, but we should always prepare the targetData (the 'interaction' object) with an array value at the choice key.

src/components/DisplayMenu.jsx

@@ -1,12 +1,10 @@
 import { useState, useEffect } from 'react';
 
 import ScreenStack from './ScreenStack';
-import { ACTIONS } from '../Actions';
 import useSave from '../hooks/useSave';
 import { minifyNumbers, bufferize } from '../utils';
 
 const OPTION_KEYS = '1234567890ABCDEFGHIJKLMNOPQRSTUVWXYZ';
-const SUB_MENU_CHOICES = [ACTIONS.BUY, "Load"];
 
 export default function DisplayMenu({
   width, height,
@@ -48,8 +46,7 @@ export default function DisplayMenu({
 
   // Prepare sub menu options view
   useEffect(() => {
-    // console.log("Active choice", activeChoice, targetData);
-    if (!targetData || !SUB_MENU_CHOICES.includes(activeChoice)) {
+    if (typeof targetData?.[activeChoice] !== 'object') {
       setSubOptions(null);
       return;
     }