Improve invitation link handling

See merge request !200

Make register page match sketches

See merge request !198

Page now also handles failing api requests when searching.

Resolves: GREG-134

Modify styling of sponsor frontpage

See merge request !196

Change rules for role dates

See merge request !189

Improvements to consent choices

See merge request !199

Allow sponsors access to all roles on their units

See merge request !185

It has been decided that a sponsor at a unit should have access to all
roles at that unit. This includes all units accessible through
hierarchical access.

Resolves: GREG-150

Dates can now be changed after they have started and ended. This means
that there is no situation which needs disabling the input fields, and
disabling has been removed.

Start and end date can now be in the past. The following rules apply:
 - Start dates can be any date in the past, and no more into the future
   than the max days property of the role type.
 - End dates follow the same rules
 - End dates must be equal to or later than start date.

Notification publishing has been reviewed to ensure duplicate
notifications are not created when start or end date is today.

Resolve: GREG-148

- Combine the /invite and /invitelink endpoints into one
- Return error messages from the backend
- Handle errors in the frontend
- Lower number of queries ran when calling the userinfo endpoint

- Add test data for consent choices
- Show consent choices made by persons
- Add consent type to ConsentChoice.__str__ to tell them apart in the admin interface

GREG-138: Adding an error report component

See merge request !197

GREG-123: Adding option for acronym identifier import from orgreg

See merge request !191

GREG-140: Remove other identity type

See merge request !195

Add favicons to frontend

See merge request !193

Styling now matches the figma sketches

Greg 87 invitation logout

See merge request !192

GREG-136: Adding today as default date

See merge request !190

Tests/identity coverage

See merge request !183

Add label to email field

See merge request !181

GREG-130: Allow dnumber

See merge request !187

Used to "log" a user out in the manual invite flow

Adding available_in_search field to output

See merge request !188