[Bug] Fixed issue where menu can't be opened up after a trainer battle (#3932)

src/ui/modifier-select-ui-handler.ts

@@ -122,6 +122,9 @@ export default class ModifierSelectUiHandler extends AwaitableUiHandler {
   }
 
   show(args: any[]): boolean {
+
+    this.scene.disableMenu = false;
+
     if (this.active) {
       if (args.length >= 3) {
         this.awaitingActionInput = true;