Investigate whether it is possible to use a generic conversion to provide tabular listing of items and item add forms to catch more plugins that implement such pages.
As an example, the admin/accounts/users page (from the AccountManager? plugin that is installed by default) could be used to look at this.
Warning No events reported for defect: Generic conversion for admin table listings and add forms (new) in the last 30 days since Feb 28, 2015. This may happen if system is not configured correctly. Please contact your administrator if you think this is the case.