fix(ui): selected model not highlighted

Author: psychedelicious

invokeai/frontend/web/src/features/parameters/components/ModelPicker.tsx

@@ -281,8 +281,11 @@ export const ModelPicker = typedMemo(
 
       for (const optionOrGroup of options) {
         if (isGroup(optionOrGroup)) {
-          _selectedOption = optionOrGroup.options.find((o) => o.key === selectedModelConfig.key);
-          break;
+          const result = optionOrGroup.options.find((o) => o.key === selectedModelConfig.key);
+          if (result) {
+            _selectedOption = result;
+            break;
+          }
         } else if (optionOrGroup.key === selectedModelConfig.key) {
           _selectedOption = optionOrGroup;
           break;