Add disable all button to email notification settings

app/public/static/js/email_disable_all.js

@@ -0,0 +1,10 @@
+// @author rubenwardy
+// @license magnet:?xt=urn:btih:1f739d935676111cfff4b4693e3816e664797050&dn=gpl-3.0.txt GPL-v3-or-Later
+
+"use strict";
+
+const disableAll = document.getElementById("disable-all");
+disableAll.classList.remove("d-none");
+disableAll.addEventListener("click", () => {
+	document.querySelectorAll("input[type='checkbox']").forEach(x => { x.checked = false; });
+});