[Full Changelog](https://github.com/vector-im/riot-web/compare/v1.4.1...v1.4.2-rc.1) * Custom themes MVP [\#11017](https://github.com/vector-im/riot-web/pull/11017) * Document permalinkPrefix setting [\#11007](https://github.com/vector-im/riot-web/pull/11007)