I need to be able to be able to allow a user to display and "show a number of items per page" drop down menu for example:   Show: 10, 20, 30 and View ALL   it does not have to necessarily be 10, 20, 30 etc. it can be in increments of 5 (5, 10, 15 and so on) see the screenshot attached and let me know how I can add this module and/or modify any of the core files!