feat(diary) Default Meal time values and Portions dynamic display for each meal

lib/widgets/custom_edit_drop_down.dart

@@ -23,6 +23,7 @@ class CustomDropDown extends StatelessWidget {
     this.filled = true,
     this.validator,
     this.onChanged,
+    this.defaultValue,
   }) : super(
           key: key,
         );
@@ -61,6 +62,8 @@ class CustomDropDown extends StatelessWidget {
 
   final bool? filled;
 
+  final SelectionPopupModel? defaultValue;
+
   final FormFieldValidator<SelectionPopupModel>? validator;
 
   final Function(SelectionPopupModel)? onChanged;
@@ -94,6 +97,7 @@ class CustomDropDown extends StatelessWidget {
           }).toList(),
           decoration: decoration,
           validator: validator,
+          value: defaultValue,
           onChanged: (value) {
             onChanged!(value!);
           },