- Create a new loginbox component. To be used as invitation login
  latter.
- Add a util function that creates the correct stylized institution abbrevation

Aria did not match label when changing langauge, and an id was
duplicated

All A and AA problems have been fixed except a missing label on an input
field.

Instead of forcing a reload of the page, we trigger a new api call in
the background, meaning we don't get a flash when verifying an identity.

Serialization has been moved to serializer classes, sharing them when
sensible and Views have been converted to ViewSets to simplify code.

The profile page of a guest now shows a verification button if the guest
has a passport or national identificaiton number that has not been
verified. Clicking the button shows a dialog, with a confirmation button
which triggers a PATCH request to the backend and reloads the page when
it returns.

Resolves: GREG-101

Move the height/width settings to the logo component

- The hook returns the info for a single guest, and a function to reload
  that info from the api.
- The roles of the guest are now on the roles attribute of the guest
  object instead of as its own object.
- Adding a new role now triggers a reload of the data from the api after
  the post request has completed.

Resolves: GREG-114

An api path was missing a slash and a save button did not redirect back
to the previous location