* Remove some of the overloading of SidebarState.updateVisibility * Remove the no-longer-used #previousLauncherExpanded property * SidebarController.hide() just hides the panel (same as legacy/original API) * Skip the browser_toolbarKeyNav.js test when sidebar.revamp=true, this should have been failing all along. Differential Revision: https://phabricator.services.mozilla.com/D242240