chore: convert message to toast notification

(cherry picked from commit fc71001110)

erpnext/manufacturing/doctype/bom_creator/bom_creator.py

@@ -473,7 +473,12 @@ def get_parent_row_no(doc, name):
 		if row.name == name:
 			return row.idx
 
-	frappe.msgprint(_("Parent Row No not found for {0}").format(name))
+	if name == doc.name:
+		return None
+
+	frappe.msgprint(_("Parent Row No not found for {0}").format(name), alert=True)
+
+	return None
 
 
 @frappe.whitelist()