Now if a user attempts to log in from a login page with a stale
CSRF token, they will be redirected to the dashboard or, if they
have logged out, to a fresh login page.

Rename QuestionChartWidget to TermCountChartWidget as this is what it does, and pull the actual data from the transport layer.

Now raises TransportException if taxonomy does not exist

Now checks if taxonomy exists

Ensure dashboard displays error in case of missing or faulty widget, rather than causing the whole application to fail.

In order to support the next test, which will use a slug of a
taxonomy that doesn't exist

remove unused import and fix pep8 white space

Rename select_action to select_item which makes more sense. Rename the checkbox itself select_item_id to allow other types of selectes in the future. Move the code to determing selected items into ItemTable since this is where the form is generated, and we know how it was build.

Names are now tested elsewhere

The Data Layer apps need to prceed the local ones because of
dependencies, the app can depend on the data layer and imports
them before they have been initialised

https://trello.com/c/Q9hEiE20/83-change-categories-available-to-match-those-specified-in-the-story

Changed name from default 'pk' to 'slug' as that is what we are passing in to the API.