Verify phone country code in register form

See merge request !258

Add quickfix for role info page

See merge request !257

Greg 172 Normalise frontend font sizes

See merge request !256

The page relied on the visitor having gone to one of the other sponsor
pages before going to it. By setting some default values for the role
info the page now works if you go directly to it. Should probably
restructure this page to display a loading graphic if a future version
of the app is ever created.

Resolves: GREG-184

Redirect invited guests to register

See merge request !254

Remove remains of django-sesame

See merge request !246

Fix links in registration and confirmation emails

See merge request !255

GREG-160: Error temporarily showing

See merge request !252

If the user logs in through the frontpage we now check if they have
completed the registration process. If they have completed it halfway
before, we find their info through the GregUserProfile of the user and
redirect to the register page. If we dont find any profile connected to
the user they are treated as anonymous users as before.

Resolves: GREG-164

Add consent info to guest frontpage

See merge request !251

Add fallback to OU names in frontend

See merge request !250

Make role info page match sketch

See merge request !249

Allow changing past start dates of roles in webui

See merge request !248

Resolves: GREG-177

Resolves: GREG-173

Add oidc info to README

See merge request !247

Not all OUs have names in all languages in OrgReg. We now fallback to
english if norwegian names are missing and vice versa.

Resolves: GREG-178

Roles that have started could not be given start dates in the past in
the frontend. After this fix they now can.

Update heading text on landing page

See merge request !245

Making it clearer that more than the phone number may need to be filled in

See merge request !244

Updating text on search page

See merge request !243

GREG-165: Handling case where guest uses ID porten for login

See merge request !242

Link login was replaced by our own implementation some time ago, making
sesame pointless.