Update SalesOrder model to refine state validation for invoice actions

- Enhanced the disabled logic for invoice actions by introducing a list of allowed states: 'delivered', 'sent', 'confirmed', 'shipped', 'partiallyDelivered', and 'partiallyShipped'.
- Simplified the return statement for better readability and maintainability.

src/database/models/SalesOrder.js

@@ -102,12 +102,18 @@ export const SalesOrder = {
       url: (_id) =>
         `/dashboard/sales/salesorders/info?salesOrderId=${_id}&action=newInvoice`,
       disabled: (objectData) => {
-        return objectData?.state?.type != 'delivered'
+        const allowedStates = [
+          'delivered',
+          'sent',
+          'confirmed',
+          'shipped',
+          'partiallyDelivered',
+          'partiallyShipped'
+        ]
+        return !allowedStates.includes(objectData?.state?.type)
       }
     },
-    {
+    { type: 'divider' },
-      type: 'divider'
-    },
     {
       name: 'post',
       label: 'Post',