Merge branch 'merge-release-3.0' into 'master'

CHANGELOG.rst

Dockerfile

README.rst

aleksis/core/apps.py

aleksis/core/forms.py

aleksis/core/frontend/app/apollo.js

aleksis/core/frontend/app/dateTimeFormats.js

aleksis/core/frontend/components/LegacyBaseTemplate.vue

aleksis/core/frontend/components/app/App.vue

aleksis/core/frontend/components/app/whoAmI.graphql

...s/authorized_oauth_applications/AuthorizedApplication.vue

.../authorized_oauth_applications/AuthorizedApplications.vue

...onents/authorized_oauth_applications/accessTokens.graphql

...ts/authorized_oauth_applications/revokeOauthToken.graphql

...re/frontend/components/celery_progress/CeleryProgress.vue

aleksis/core/frontend/components/generic/UpdateIndicator.vue

...core/frontend/components/generic/dialogs/DeleteDialog.vue

aleksis/core/frontend/index.js

aleksis/core/frontend/messages/de.json

aleksis/core/frontend/messages/en.json