Release 2.5

See merge request !858

Resolve "Problems with current version of Celery (5.2.0)"

Closes #542

See merge request !849

Translations update from Weblate

See merge request !857

[Docs] Fix development documentation

See merge request !855

Resolve "Add recursive helper methods for Group"

Closes #408

See merge request !852

Currently translated at 100.0% (622 of 622 strings)

Translation: AlekSIS/AlekSIS-Core
Translate-URL: https://translate.edugit.org/projects/aleksis/aleksis-core/de/

Currently translated at 100.0% (604 of 604 strings)

Translation: AlekSIS/AlekSIS-Core
Translate-URL: https://translate.edugit.org/projects/aleksis/aleksis-core/de/

Update translation files

See merge request !856

Resolve "OAuth2 broken in 2.4"

Closes #592

See merge request !854

#592

Add trademark to readme

See merge request !853

Resolve "PDF files offered for download despite of error"

Closes #590

See merge request !848

Merge branch '470-login-with-local-django-accounts-and-ldap-password-changes-are-mutually-exclusive' into 'master'

Resolve "Login with local Django accounts and LDAP password changes are mutually exclusive"

Closes #470

See merge request !847

This is only set if LDAP is enabled on the site being migrated, to
ensure the change in 42f5708d does not
leave existing sites vulnerable to users authenticating with shadow
copies created before the change.