Add a new column to settings showing if they are overrided via environment variable.

Signed-off-by: Roberto Rosario <roberto.rosario.gonzalez@gmail.com>

HISTORY.rst

@@ -112,6 +112,9 @@
 - Add support for extended templates when there are no results.
 - Add help messages and useful links to several apps when there
   are no results available.
+- Add a new column to settings showing if they are overrided
+  via environment variable.
+
 
 3.0.3 (2018-08-17)
 ==================

mayan/apps/smart_settings/apps.py

@@ -3,6 +3,7 @@ from __future__ import unicode_literals
 from django.utils.translation import ugettext_lazy as _
 
 from common import MayanAppConfig, menu_sidebar, menu_setup, menu_object
+from common.widgets import TwoStateWidget
 from navigation import SourceColumn
 
 from .classes import Namespace, Setting
@@ -36,6 +37,13 @@ class SmartSettingsApp(MayanAppConfig):
         SourceColumn(
             source=Setting, label=_('Value'), attribute='serialized_value'
         )
+        SourceColumn(
+            source=Setting, label=_('Environment variable'),
+            func=lambda context: TwoStateWidget(
+                center=True,
+                state=context['object'].environment_variable
+            ).render()
+        )
 
         menu_object.bind_links(
             links=(link_namespace_detail,), sources=(Namespace,)