Removed old whoosh highlighting patch due update whoosh to 2.1
https://bitbucket.org/marchael/moin-2.0/changeset/a2aee9baecd3
https://bitbucket.org/marchael/moin-2.0/changeset/5d805b9f5e91
Added checkbox for search in non-current revisions https://bitbucket.org/marchael/moin-2.0/changeset/66981eb25822
Fixed issue with search in documents with limited rights https://bitbucket.org/marchael/moin-2.0/changeset/6800ab9dd159