This is then used in Theme dialog to show which themes are available. Also add the existing hardcoded themes as theme def. files. Change-Id: I230bc84ae70f22b558aa31053339d602d04885bb Reviewed-on: https://gerrit.libreoffice.org/c/core/+/180541 Tested-by: Jenkins Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>