NEW: MIH MineSweeper Package pt2

Frontend/lib/mih_components/mih_package_components/mih_dropdwn_field.dart

@@ -10,6 +10,7 @@ class MihDropdownField extends StatefulWidget {
   final bool editable;
   final bool enableSearch;
   final FormFieldValidator<String>? validator;
+  final Function(String?)? onSelected;
 
   const MihDropdownField({
     super.key,
@@ -20,6 +21,7 @@ class MihDropdownField extends StatefulWidget {
     required this.editable,
     required this.enableSearch,
     this.validator,
+    this.onSelected,
   });
 
   @override
@@ -153,6 +155,7 @@ class _MihDropdownFieldState extends State<MihDropdownField> {
                     ),
                     onSelected: (String? selectedValue) {
                       field.didChange(selectedValue);
+                      widget.onSelected?.call(selectedValue);
                     },
                     menuStyle: MenuStyle(
                       backgroundColor: WidgetStatePropertyAll(