In previous versions when a tag-group with only one choice (a checkbox) was
set to a folder and subsequently removed on a host in that folder, the "show hosts"
REST API call on that folder crashed with a 500 error (with the error: "tag_xxx can
not be None").
This werk fixes this behaviour. Apache still needs to be restarted so newly created
tag-groups come into effect on the REST API.
To the list of all Werks