Set existing images as checked

arkindex/images/migrations/0002_image_status.py

@@ -16,7 +16,7 @@ class Migration(migrations.Migration):
             model_name='image',
             name='status',
             field=enumfields.fields.EnumField(
-                default='unchecked',
+                default='checked',
                 enum=arkindex.images.models.ImageStatus,
                 max_length=50
             ),