Option to combine searches

[AlphaKretin]

For example, take a previous set of results and apply an additional filter to it. This will also allow searching for results that match multiple phrases, or adding a text search to a name match.

[kevinlul]

Lucene query strings in the replacement command (DawnbrandBots/bastion-bot#343) support much more complex and nested logic, which covers this use case.