When in the Administration section, you go to Modules, Activities, Manage Activities and click an activities number to "show list of courses containting activity"
For example, the page now says
Search results: 64
Page: 1 2 3 (Next)
Several issues here...all 64 courses containing the activity are listed from the search...but the links at the top let you go to page 2 and 3 of the results (shot2.jpg). If you click one of those links you get the screenshot I've attached (shot3.jpg).
The Show All 64 link that points to here: moodle/course/search.php?search=&perpage=99999 also produces the page seen in the shot2.jpg screenshot.