the combineNeFilters performance improvement will now work with nested operators
Some Ghost serializers wrap the filter strings, so we need to be able to handle nested statements in order for the performance improvement to be useful, specifically with {{#get}} helpers fetching posts.
ref https://linear.app/tryghost/issue/CFR-27
Some Ghost serializers wrap the filter strings, so we need to be able to handle nested statements in order for the performance improvement to be useful, specifically with {{#get}} helpers fetching posts.