Add the button to delete beneficiaries

lib/ui/pages/beneficiary_list.dart

@@ -18,6 +18,14 @@ class BeneficiaryListPage extends StatelessWidget {
                 final item = state.beneficiaries[index];
                 return ListTile(
                   leading: ImageWrapper(title: item.name, path: item.imagePath),
+                  // TODO: Allow deleting beneficiaries
+                  trailing: IconButton(
+                      onPressed: null,
+                      icon: Icon(
+                        Icons.delete,
+                        color: Colors.grey,
+                      ),
+                  ),
                   title: Text(item.name),
                 );
               },