User Story 61, EXTENSION: Admin links to User's Order Show from Admin Dashboard

[memcmahon]

As an admin user
When I visit my dashboard and see all order data
The order ID is a link to an admin-only view of the order
When I click on the link for an order ID,
My URL route is "/admin/users/5/orders/15"

DO THESE STORIES FIRST:

• User Story 56, Admin User Profile Page

Checklist:

• base tests are written
• base code is written to pass tests
• edge case ("sad path") tests written (if required)
• edge case code written (if required)
• code is reviewed
• branch is merged
• all tests still pass

child of turingschool-projects#201

child of turingschool-projects#274

depends on turingschool-projects#206