Merge branch 'prepare-release-2.0rc1' into 'release/2.0'

CHANGELOG.rst

aleksis/core/preferences.py

aleksis/core/settings.py

aleksis/core/static/style.scss

aleksis/core/templates/core/base.html

aleksis/core/templates/core/base_print.html

aleksis/core/templates/core/edit_dashboard.html

aleksis/core/templates/core/group/child_groups.html

aleksis/core/templates/core/group/full.html

aleksis/core/templates/core/group/list.html

aleksis/core/templates/core/index.html

aleksis/core/templates/core/partials/announcements.html

aleksis/core/templates/core/person/full.html

aleksis/core/templates/core/person/list.html

aleksis/core/templates/oauth2_provider/application_list.html

aleksis/core/templates/search/search.html

aleksis/core/templates/socialaccount/connections.html

aleksis/core/templates/two_factor/core/backup_tokens.html

aleksis/core/templates/two_factor/core/phone_register.html

aleksis/core/templates/two_factor/core/setup.html