Do not refer to activated modules as installed

issue9395
review311721004

doc/index.rst

@@ -4,5 +4,5 @@ Account Product Module
 The account product module adds accounting on product and category.
 
 .. note::
-    If the analytic account module is installed, it also adds the product and
+    If the analytic account module is activated, it also adds the product and
     category as criteria for the analytic rule engine.