Checkbox enabled lists for enumerated annotations
Enumerated annotations uses a kind of auto-completion input field. Once you start typing the list is filtered to match the text so far. The intention is to make it easier to filter on annotations that has many options. However, this kind of functionality doesn't work very well with only a few options. In this case, it would be better to use the other type of filter lists (with checkboxes). A simple way to decide which system to use is to let the admin decide by setting the "Interface" option on the annotation type.
Selection list = as it is now radiobuttons/checkboxes = list with checkboxes