Added Disabled field to Supplier and Customer doctype
Frozen field is moved to More Information section for Customer and Supplier. Any Supplier/Customer which is disabled will not be shown while creating PO/SO
diff --git a/erpnext/exceptions.py b/erpnext/exceptions.py
index c339edf..808523b 100644
--- a/erpnext/exceptions.py
+++ b/erpnext/exceptions.py
@@ -5,3 +5,4 @@
 class CustomerFrozen(frappe.ValidationError): pass
 class InvalidAccountCurrency(frappe.ValidationError): pass
 class InvalidCurrency(frappe.ValidationError): pass
+class CustomerDisabled(frappe.ValidationError):pass