Resolve "Fields must be unique per site"

Closes #250 and #456

See merge request !250

Resolve "Edit dashboard button collides with announcements"

Closes #452

See merge request !621

Resolve "Login form does not redirect to given url"

Closes #455

See merge request !624

Closes #456

Write changelog for 2.0b0

See merge request !619

Update poetry.lock

See merge request !623

Merge branch '454-remove-social-account-card-on-login-page-if-there-are-no-social-accounts' into 'master'

Resolve "Remove social account card on login page if there are no social accounts"

Closes #454

See merge request !622

Resolve "User registration"

Closes #331, #236, #354, and #353

See merge request !413

Update translation files

See merge request !618

Resolve "Remove token-based filenames for generated PDF files"

Closes #449

See merge request !617

Fix pre-migration errors due to not available tables etc.

See merge request !613

Remove legacy file upload function

See merge request !614

Update lock file to get haystack-redis back to upstream

See merge request !616

Resolve "Unavailable Redis hangs login request"

Closes #394

See merge request !552

Resolve "Rely on object permissions for search index"

Closes #363

See merge request !591

Merge branch '363-rely-on-object-permissions-for-search-index' of https://edugit.org/AlekSIS/official/AlekSIS-Core into 363-rely-on-object-permissions-for-search-index