in js/theme.js [270:281]
$(caption).each(function () {
var menuName = this.innerText.replace(/[^\w\s]/gi, "").trim();
$(this).find("span").addClass("checked");
if (collapsedSections.includes(menuName) == true && collapseAdded && sessionStorage.getItem(menuName) !== "expand" || sessionStorage.getItem(menuName) == "collapse") {
$(this.firstChild).after("<span class='expand-menu'>[ + ]</span>");
$(this.firstChild).after("<span class='hide-menu collapse'>[ - ]</span>");
$(this).next("ul").hide();
} else if (collapsedSections.includes(menuName) == false && collapseAdded || sessionStorage.getItem(menuName) == "expand") {
$(this.firstChild).after("<span class='expand-menu collapse'>[ + ]</span>");
$(this.firstChild).after("<span class='hide-menu'>[ - ]</span>");
}
});