Resolve "Hide an artist in the UI"

api/config/api_urls.py

api/funkwhale_api/common/views.py

api/funkwhale_api/favorites/filters.py

api/funkwhale_api/history/filters.py

api/funkwhale_api/history/views.py

api/funkwhale_api/moderation/admin.py

api/funkwhale_api/moderation/factories.py

api/funkwhale_api/moderation/filters.py

...hale_api/moderation/migrations/0002_auto_20190213_0927.py

api/funkwhale_api/moderation/models.py

api/funkwhale_api/moderation/serializers.py

api/funkwhale_api/moderation/urls.py

api/funkwhale_api/moderation/views.py

api/funkwhale_api/music/filters.py

api/funkwhale_api/music/views.py

api/funkwhale_api/playlists/models.py

api/funkwhale_api/playlists/serializers.py

api/funkwhale_api/radios/radios.py

api/funkwhale_api/subsonic/views.py

api/tests/favorites/test_filters.py