Resolve map problem.

lib/models/expense.dart

@@ -45,7 +45,10 @@ enum ExpenseCategory {
   shopping('Shopping', Icons.shopping_bag),
 
   /// Other miscellaneous expenses
-  other('Other', Icons.category);
+  other('Other', Icons.category),
+
+  /// Reimbursement for settling debts
+  reimbursement('Remboursement', Icons.monetization_on);
 
   const ExpenseCategory(this.displayName, this.icon);