src/vs/platform/actions/common/menuService.ts/PersistedMenuHideState/reset
class PersistedMenuHideState:	reset(menus?: MenuId[]): void {
		if (menus === undefined) {
			// reset all
			this._data = Object.create(null);
			this._persist();
		} else {
			// reset only for a specific menu
			for (const { id } of menus) {
				if (this._data[id]) {
					delete this._data[id];
				}
			}
			this._persist();
		}
	}