Merge branch 'master' into 1107-vue-rework-person-create-edit

CHANGELOG.rst

aleksis/core/apps.py

aleksis/core/checks.py

aleksis/core/forms.py

.../core/frontend/components/announcements/Announcements.vue

...e/frontend/components/announcements/announcements.graphql

aleksis/core/frontend/components/calendar/Calendar.vue

...omponents/calendar/personal_event/PersonalEventDialog.vue

.../components/calendar/personal_event/personalEvent.graphql

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

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

.../frontend/components/generic/dialogs/DialogObjectForm.vue

.../core/frontend/components/generic/forms/DateTimeField.vue

aleksis/core/frontend/components/oauth/OAuthApplications.vue

.../core/frontend/components/oauth/oauthApplications.graphql

aleksis/core/frontend/messages/de.json

aleksis/core/frontend/messages/en.json

aleksis/core/frontend/mixins/formRulesMixin.js

aleksis/core/frontend/mixins/objectFormMixin.js

aleksis/core/frontend/mixins/objectFormPropsMixin.js