Search for subtype and annotation type among proper main item type
Reggie uses the name of a subtype (eg. Histology) and annotation type to find the item in the database, but in some cases there are items with the same name that belong to different main item types (eg. Histology[Sample] and Histology[Protocol]). This used to work before #380 but doesn't any longer.
Temporary workaround is to rename any duplicate item not used by Reggie. Reggie doesn't use any duplicates but it may affect other use cases (eg. batch importers).