fix(pos): multiple pos fixes and additions (#24227)

* fix: make custom fields in pos invoice similar to sales invoice

* feat: allow/disallow rate & discount change

* fix: any pos profile can be selected while creating pos opening

* fix: cannot add item to cart

* fix: validate phone payment only if payment request exists

* fix: replace pos payment method patch

* chore: rearrange item & customer group filter

* fix: allow/disallow invoice level discount

* fix: updating qty of item with uom having space char

* fix: move configuration checbox to config section

* fix: invalid item rate trigger

* fix: cannot remove item from draft invoices

* fix: customer currency not set in pos invoice

* fix: duplicate item error message

* fix: sales uom not fetched in pos invoice

* fix: cannot add taxes to pos invoice for uae region

* fix: cannot merge pos invoice into credit note

* fix: tax calculation while merging pos invoices

* feat: delete draft orders from order list

* fix: merging of pos invoice with pricing rules
diff --git a/erpnext/stock/get_item_details.py b/erpnext/stock/get_item_details.py
index dfe8fea..873cfec 100644
--- a/erpnext/stock/get_item_details.py
+++ b/erpnext/stock/get_item_details.py
@@ -19,7 +19,7 @@
 
 from six import string_types, iteritems
 
-sales_doctypes = ['Quotation', 'Sales Order', 'Delivery Note', 'Sales Invoice']
+sales_doctypes = ['Quotation', 'Sales Order', 'Delivery Note', 'Sales Invoice', 'POS Invoice']
 purchase_doctypes = ['Material Request', 'Supplier Quotation', 'Purchase Order', 'Purchase Receipt', 'Purchase Invoice']
 
 @frappe.whitelist()