Added search to User Demographics Admin page

openedx/core/djangoapps/demographics/admin.py

@@ -11,8 +11,9 @@ class UserDemographicsAdmin(admin.ModelAdmin):
     """
     Admin for UserDemographics Model
     """
-    list_display = ('user', 'show_call_to_action')
+    list_display = ('id', 'user', 'show_call_to_action')
     readonly_fields = ('user',)
+    search_fields = ('id', 'user__username')
 
     class Meta(object):
         model = UserDemographics