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

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

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

Change popoulate_fixtures to a management command

See merge request !186

Make the login-page look like the sketch.

See merge request !184

Move add role button

See merge request !182

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

The Role model has a not null constraint on the sponsor field, so it is
impossible for a Role object to not have this attribute.

Fix various WCAG things in frontend

See merge request !178

Bugfix/reload guests on verify

See merge request !180