doc(): add a screenshot for the history_list_display

Author: gbataille

docs/screens/5_history_list_display.png

@@ -137,7 +137,7 @@ By default, the history log displays one line per change containing
 * a comment corresponding to the change
 * the author of the change
 
-You can add other columns (for example the object's status if it has one to see
+You can add other columns (for example the object's status to see
 how it evolved) by adding a ``history_list_display`` array of fields to the
 admin class
 
@@ -157,6 +157,9 @@ admin class
     admin.site.register(Choice, SimpleHistoryAdmin)
 
 
+.. image:: screens/5_history_list_display.png
+
+
 Querying history
 ----------------