Improve the interface for creating API limits

[jwalgran]

Overview

ApiLimit objects are currently managed via the Django admin with not custom behavior. Update this management interface, either by replacing it with a React page under /dashboard or modifying the Django admin page so that more context is available when creating ApiLimit records.

Is your feature request related to a problem? Please describe.

In the initial set of 6 limits I created when launching the API limiting feature, 2 were incorrect. In both cases there were multiple contributors with similar names and I created the limit with the wrong contributor.

Some deficiencies in the current Django admin form:

• The contributor dropdown is not sorted alphabetically
• The related admin user for the contributor is not shown
• Aggregated historical API request activity is not shown

Describe the solution you'd like

• Create an updated management UI for API limits that makes it less likely that the wrong contributor account is selected.