Merge branch 'master' into 376-prevent-deep-linking-to-media-files

Dockerfile

aleksis/core/forms.py

aleksis/core/migrations/0001_initial.py

aleksis/core/migrations/0002_school_term.py

aleksis/core/migrations/0007_dashboard_widget_order.py

aleksis/core/migrations/0008_data_check_result.py

aleksis/core/migrations/0013_pdf_file.py

aleksis/core/migrations/0015_oauth_permissions.py

aleksis/core/migrations/0016_taskuserassignment.py

aleksis/core/mixins.py

aleksis/core/models.py

aleksis/core/settings.py

aleksis/core/static/js/progress.js

aleksis/core/static/style.scss

...re/templates/material/fields/ckeditor_ckeditorwidget.html

aleksis/core/tests/models/test_group_sync.py

aleksis/core/urls.py

aleksis/core/util/apps.py

aleksis/core/util/celery_progress.py

aleksis/core/util/core_helpers.py