Admin updates

Need 2 updates on the Admin menu:
- [x] Need a groups menu to see which groups have been created by people. We also need checkbox near it to say if we are going to feature it on the home page!
- [x] Need a filter in Redeem requests. By default I want to see only the open redeem requests. It can be a tab or a select box that shows us the closed requests too. I need an option to "delete" redeem requests.
- [ ] Pagination is lost after filter fix! /cc @BandanaPandey

Start with the Admin menu, the groups menu, and the Redeem requests filter described in the issue. Verify that groups can be featured, redeem requests can be filtered and deleted, and pagination still works after filtering; the checklist indicates these are the completion criteria.

Escrito por el modelo de indexación a partir del texto del issue.