fix(customer): add customer group filters

(cherry picked from commit 1e3db9f)

Author: SowmyaArunachalam

erpnext/selling/doctype/customer/customer.json

@@ -183,6 +183,7 @@
    "in_list_view": 1,
    "in_standard_filter": 1,
    "label": "Customer Group",
+   "link_filters": "[[\"Customer Group\", \"is_group\", \"=\", 0]]",
    "oldfieldname": "customer_group",
    "oldfieldtype": "Link",
    "options": "Customer Group",
@@ -625,7 +626,7 @@
    "link_fieldname": "party"
   }
  ],
- "modified": "2026-01-16 15:56:05.967663",
+ "modified": "2026-01-21 17:23:42.151114",
  "modified_by": "Administrator",
  "module": "Selling",
  "name": "Customer",

erpnext/selling/doctype/selling_settings/selling_settings.json

@@ -61,6 +61,7 @@
    "fieldtype": "Link",
    "in_list_view": 1,
    "label": "Default Customer Group",
+   "link_filters": "[[\"Customer Group\", \"is_group\", \"=\", 0]]",
    "options": "Customer Group"
   },
   {
@@ -297,7 +298,7 @@
  "index_web_pages_for_search": 1,
  "issingle": 1,
  "links": [],
- "modified": "2026-01-02 18:17:05.734945",
+ "modified": "2026-01-21 17:28:37.027837",
  "modified_by": "Administrator",
  "module": "Selling",
  "name": "Selling Settings",