All file-handling code is required to use the storage API.

Resolve "Favicon code regenerates favicons on every load"

Closes #447

See merge request !612

Resolve "Prevent deep linking to media files"

Closes #376

See merge request !610

Resolve "AttributeError at /data_check/ for datachecks from uninstalled apps"

Closes #442

See merge request !609

This ensures links to media files are only valid for a short period of time,
much like when using an S3 CDN server.

Closes #376

Catch excecptions in objectgetter_optional e. g. if a user has no person

See merge request !608

Increase selenium timeout for pdffile

See merge request !606

Resolve "favicon / icon generation mauls database"

Closes #356 und #412

See merge request !601

Resolve "Define rules to require 2FA for views or parts of them"

Closes #437

See merge request !605

Remove dependency "requests". Closes #436

Closes #436

See merge request !604

Disable fr and nb languages in frontend

See merge request !603

Merge branch '356-favicon-icon-generation-mauls-database' of edugit.org:AlekSIS/official/AlekSIS-Core into 356-favicon-icon-generation-mauls-database

The unwrapped structure needs to go through the main encoding function again, because that handles plain Python types.

Merge branch '443-haystack-exceptions-missingdependency-the-whoosh-backend-requires-the-installation-of-whoosh' into 'master'

Resolve "haystack.exceptions.MissingDependency: The 'whoosh' backend requires the installation of 'Whoosh'."

Closes #443

See merge request !602

Merge branch '356-favicon-icon-generation-mauls-database' of edugit.org:AlekSIS/official/AlekSIS-Core into 356-favicon-icon-generation-mauls-database

Merge branch '356-favicon-icon-generation-mauls-database' of edugit.org:AlekSIS/official/AlekSIS-Core into 356-favicon-icon-generation-mauls-database

django-favicon-plus now includes own caching mechanisms