Add navigation pictures to smart links chapter

docs/topics/smart_links.rst

@@ -2,8 +2,23 @@
 Smart links
 ===========
 
+|Setup tab| |Right arrow| |Smart links button|
+
 Smart links are usefull for navigation between documents.  They are rule
 based but don't created any organizational structure just show the documents
 that match the rules as evaluated against the metadata of the currently
 displayed document.  The index is global, the smart links are dependant
 on the current document the user is viewing.
+
+
+.. |Setup tab| image:: /_static/setup_tab.png
+ :alt: Setup tab
+ :align: middle
+
+.. |Right arrow| image:: /_static/arrow_right.png
+ :alt: Right arrow
+ :align: middle
+
+.. |Smart links button| image:: /_static/smart_links_button.png
+ :alt: Smart links button
+ :align: middle