Admin fixes

### Fixed a bunch of bugs in the admin.

I just completed all of the bugs / fixes on my pivotal board for the admin. Specifics below:

- [x] Fixed redirection bug in admin by removing trailing slashes from urls.
- [x] Added single model entry view that Ainsley will style later. (**If you want, don't merge until we style today**)
- [x] Fixed some labels and stuff that was on my pivotal board.

For reviewing later today @MrMaksimize  :smile: