Error icon shows on dash for chapter-processed book when there isn't an error
Expected behaviour
As per #370 (closed), for chapter-processed booksI should see the Error icon (Red) when one or more chapters within the book has errors with severity "error"
Current behaviour
The above use case is correct, but I also see the Error icon (Red) when one or more chapters within the book does not have errors with severity "error"
Steps to reproduce
See this book: https://ncbi.cloud68.co/organizations/23378725-638a-4329-b060-3b52d85a03c9/bookmanager/9964713e-aaf5-4825-a48c-4eb8e41221e1/
Possible solution
This chapter has severity "warnings" so maybe that needs to be excluded.