Removed and introduced some borders. Added some text. Increased the size
of icons.

Resolves: GREG-142

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

Separates the queryset and the serialization from each other.

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

- 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

Code for guest routes moved to their own folder so that we don't need
multiple api calls.
Serializer class for roles has been simplified with methods for
validation of each field and a separate one used in invites without
requiring the person field.

Resolves: GREG-61

Allows changes to start- and end date for guest roles. A new endpoint
has been added to the ui api for doing PATCH request to support this.
The max days of each role type is respected.

Resolves: GREG-83

Make all URLs relative. Move /oidc and /admin endpoints up from /api and proxy them during development.