Merge branch 'master' into further-doc-improvements

CHANGELOG.rst

aleksis/core/data_checks.py

aleksis/core/forms.py

aleksis/core/locale/ar/LC_MESSAGES/django.po

aleksis/core/locale/ar/LC_MESSAGES/djangojs.po

aleksis/core/locale/de_DE/LC_MESSAGES/django.po

aleksis/core/locale/de_DE/LC_MESSAGES/djangojs.po

aleksis/core/locale/fr/LC_MESSAGES/django.po

aleksis/core/locale/fr/LC_MESSAGES/djangojs.po

aleksis/core/locale/la/LC_MESSAGES/django.po

aleksis/core/locale/la/LC_MESSAGES/djangojs.po

aleksis/core/locale/nb_NO/LC_MESSAGES/django.po

aleksis/core/locale/nb_NO/LC_MESSAGES/djangojs.po

aleksis/core/locale/tr_TR/LC_MESSAGES/django.po

aleksis/core/locale/tr_TR/LC_MESSAGES/djangojs.po

aleksis/core/migrations/0035_preference_model_unique.py

aleksis/core/models.py

aleksis/core/preferences.py

aleksis/core/settings.py

aleksis/core/static/img/aleksis-icon-maskable.png