Judgement Book configured to support "up to three ratings" per query-doc pair collects up to as many as judges are working on the Book

[wrigleyDan]

Describe the bug
When I define a Book to support multiple raters all raters can give a judgement for a query-doc pair. In the selection strategy it clearly states "up to three", so I report this as a bug.

To Reproduce
Steps to reproduce the behavior:

1. In a Quepid case create a book with the Selection strategy "Multiple Raters"
2. Make sure to share the book with a team that consists of four or more persons/accounts
3. Populate the book with query/doc pairs
4. To restrict the number of judgements you can edit the book and cut off everything after position 1
5. Make all judges collect some judgements
6. Once every judge has rated all query/doc pairs you will see that query/doc pairs are not restricted to three judgements.

Expected behavior
Only select query/doc pairs to be judged when this query/doc pair has less than three ratings.

Screenshots
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Additional context
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