Fix sorting payments by number

lib/data/models/client_model.dart

@@ -432,8 +432,7 @@ abstract class ClientEntity extends Object
         response = clientA!.idNumber.compareTo(clientB!.idNumber);
         break;
       case ClientFields.number:
-        response = compareNatural(
+        response = compareNatural(clientA!.number, clientB!.number);
-            clientA!.number.toLowerCase(), clientB!.number.toLowerCase());
         break;
       case ClientFields.website:
         response = clientA!.website

lib/data/models/expense_model.dart

@@ -468,8 +468,7 @@ abstract class ExpenseEntity extends Object
             expenseA!.documents.length.compareTo(expenseB!.documents.length);
         break;
       case ExpenseFields.number:
-        response = compareNatural(
+        response = compareNatural(expenseA!.number, expenseB!.number);
-            expenseA!.number.toLowerCase(), expenseB!.number.toLowerCase());
         break;
       case ExpenseFields.privateNotes:
         response = expenseA!.privateNotes.compareTo(expenseB!.privateNotes);

lib/data/models/invoice_model.dart

@@ -728,8 +728,7 @@ abstract class InvoiceEntity extends Object
                 invoiceBNumber.startsWith(recurringPrefix!)
             ? invoiceBNumber.replaceFirst(recurringPrefix, '')
             : invoiceBNumber;
-        response = compareNatural(
+        response = compareNatural(invoiceANumber, invoiceBNumber);
-            invoiceANumber.toLowerCase(), invoiceBNumber.toLowerCase());
         break;
       case InvoiceFields.amount:
         response = invoiceA.amount.compareTo(invoiceB.amount);

lib/data/models/payment_model.dart

@@ -4,7 +4,8 @@ import 'package:built_value/built_value.dart';
 import 'package:built_value/serializer.dart';
 
 // Project imports:
-import 'package:collection/collection.dart' show IterableExtension;
+import 'package:collection/collection.dart'
+    show IterableExtension, compareNatural;
 import 'package:flutter_redux/flutter_redux.dart';
 import 'package:invoiceninja_flutter/constants.dart';
 import 'package:invoiceninja_flutter/data/models/models.dart';
@@ -267,9 +268,7 @@ abstract class PaymentEntity extends Object
         response = paymentA!.refunded.compareTo(paymentB!.refunded);
         break;
       case PaymentFields.number:
-        response = paymentA!.number
+        response = compareNatural(paymentA!.number, paymentB!.number);
-            .toLowerCase()
-            .compareTo(paymentB!.number.toLowerCase());
         break;
       case PaymentFields.transactionReference:
         response = paymentA!.transactionReference

lib/data/models/project_model.dart

@@ -2,6 +2,7 @@
 import 'package:built_collection/built_collection.dart';
 import 'package:built_value/built_value.dart';
 import 'package:built_value/serializer.dart';
+import 'package:collection/collection.dart';
 import 'package:diacritic/diacritic.dart';
 import 'package:flutter_redux/flutter_redux.dart';
 
@@ -307,7 +308,7 @@ abstract class ProjectEntity extends Object
             projectA.documents.length.compareTo(projectB.documents.length);
         break;
       case ProjectFields.number:
-        response = projectA.number.compareTo(projectB.number);
+        response = compareNatural(projectA.number, projectB.number);
         break;
       case ProjectFields.customValue1:
         response = projectA.customValue1.compareTo(projectB.customValue1);

lib/data/models/task_model.dart

@@ -790,8 +790,7 @@ abstract class TaskEntity extends Object
         response = taskA.documents.length.compareTo(taskB.documents.length);
         break;
       case TaskFields.number:
-        response = compareNatural(
+        response = compareNatural(taskA.number, taskB.number);
-            taskA.number.toLowerCase(), taskB.number.toLowerCase());
         break;
       case TaskFields.createdBy:
         final userA = userMap[taskA.createdUserId] ?? UserEntity();

lib/data/models/vendor_model.dart

@@ -327,8 +327,7 @@ abstract class VendorEntity extends Object
             vendorA!.documents.length.compareTo(vendorB!.documents.length);
         break;
       case VendorFields.number:
-        response = compareNatural(
+        response = compareNatural(vendorA!.number, vendorB!.number);
-            vendorA!.number.toLowerCase(), vendorB!.number.toLowerCase());
         break;
       case VendorFields.address1:
         response = vendorA!.address1.compareTo(vendorB!.address1);