misc: use django localize method to format decimals in json exports (#50181)

wcs/qommon/misc.py

@@ -39,6 +39,7 @@ from django.conf import settings
 from django.utils import datetime_safe
 from django.utils import six
 from django.utils.encoding import force_text
+from django.utils.formats import localize
 from django.utils.html import strip_tags
 from django.template import TemplateSyntaxError, VariableDoesNotExist
 from django.utils.six.moves.urllib.parse import quote, urlencode
@@ -547,7 +548,7 @@ class JSONEncoder(json.JSONEncoder):
             return obj.strftime('%Y-%m-%d')
 
         if isinstance(obj, decimal.Decimal):
-            return str(obj)
+            return localize(obj)
 
         if isinstance(obj, bytes):
             return obj.decode('ascii')