Since we do not set compartor if the special field is "Relevancy" or "Quality" or "Print status", it would not work for secondary sorting. To deal with it, I add a file called "ToggleFieldComparator" to be these three toggle special field as their comparator. And it works now. Fixes #7015

• Change in CHANGELOG.md described (if applicable)
• Tests created for changes (if applicable)
• Manually tested changed features in running JabRef (always required)
• Screenshots added in PR description (for UI changes)
• Checked documentation: Is the information available and up to date? If not created an issue at https://github.com/JabRef/user-documentation/issues or, even better, submitted a pull request to the documentation repository.

Example: Set "Relevancy" as the first criteria and "Year" as the second.

Ascending

Descending