Toggle on/off for visibility, locked state, and sensitivity, the latter behind ExperimentalMode as it works only to suppress the toolbar but not to make it always visible Change-Id: Ia65a27045472d42fc013970bf9de64320f2dbcdc Reviewed-on: https://gerrit.libreoffice.org/c/core/+/195836 Reviewed-by: Heiko Tietze <heiko.tietze@documentfoundation.org> Tested-by: Jenkins