Add disabled field on User

www.agileplannerapp.com/boards/173808/cards/5886

This helps filters out users based on their Signon
state. For example, Signon would inform this app
about a user being suspended by setting `disabled`
in the user json.
Remove international delegations from embassy finder
Filter-out disabled users from lists and selects

www.agileplannerapp.com/boards/173808/cards/5886

Disabled users for now are suspended users in Signon.
They get synced over by [GDS::SSO](https://github.com/alphagov/gds-sso/pull/62).
Merge pull request #1856 from alphagov/remove-international-delegations-from-embassy-finder

Remove international delegations from embassy finder
Add a data migration to redirect phillip-marsden to philip-marsden

- Someone added a ticket to the second-line backlog to rename this
  person's slug due to a typo when it was first created. After a chat
  with Tekin, this was deemed the easiest way. This fixes, in this
  case, the bad spelling of Philip.
Merge pull request #1855 from alphagov/ignore-disabled-users

Filter-out disabled users where users are listed
Merge pull request #1861 from alphagov/rename_person_philip_marsden_slug

Add a data migration to redirect phillip-marsden to philip-marsden
Correct data migrations

These data migrations have been run now, but I'm correcting them here to be safe
in case folk use them as a reference in future.
Add CSV permission for all departmental editors

Allow all departmental editors to export the document list as a CSV.
Merge pull request #1863 from alphagov/correct-data-migration

Correct data migrations
Add an admin API for reindexing sector editions.

In order to get tag information for published
editions into Rummager (and thence to the services
and information page, among others) when a draft
specialist sector is published, we need to notify
Whitehall so it can resubmit all published editions
tagged with that specialist sector.
Merge pull request #1865 from alphagov/add-topic-reindex-endpoint

Add an admin API for reindexing sector editions.

https://www.pivotaltracker.com/story/show/83216078
Merge pull request #1864 from alphagov/extend-export-csv-permission

Add CSV permission for all departmental editors