Boxes are now spaced automatically on the login page, and the box on the
invite page fills the horizontal space.

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

If the user is neither a guest or a sponsor, generic text explaining
this is shown. If they are a guest, they are shown the data related to
them. If they are a sponsor, they are redirected to the /sponsor/ route.

Resolves: GREG-97

- Better loading of translations using suspense.
- Adds a "fetched" variable to the user objects. Enable us to show a
  spinner before the return of the userinfo call

Issue: GREG-72

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

The UserContext is used to "protect" routes

Issue: GREG-70

Move form example to the registration page.
Add some route links to the front page for easier navigiation.

- Language is no longer a prop
- Dateformat chagned to ISO 8601
- set minDate and maxDate range to between today and 1 year from now

Add start of form, input and select

- Add routing with react routing
- Placeholder header/footer and some pages

Issue: GREG-46