Merge remote-tracking branch 'origin/develop' into develop

js/gu-install-vanilla.js

@@ -10,6 +10,31 @@
 
 (function () {
 
+	//polyfill for NodeList.forEach browsers that supports ES5
+	if (window.NodeList && !NodeList.prototype.forEach) {
+	    NodeList.prototype.forEach = function (callback, thisArg) {
+		thisArg = thisArg || window;
+		for (var i = 0; i < this.length; i++) {
+		    callback.call(thisArg, this[i], i, this);
+		}
+	    };
+	}
+
+	//polyfill for Element.matches and Element.closest in IE
+	if (!Element.prototype.matches)
+	    Element.prototype.matches = Element.prototype.msMatchesSelector ||
+					Element.prototype.webkitMatchesSelector;
+	if (!Element.prototype.closest)
+	    Element.prototype.closest = function(s) {
+		var el = this;
+		if (!document.documentElement.contains(el)) return null;
+		do {
+		    if (el.matches(s)) return el;
+		    el = el.parentElement || el.parentNode;
+		} while (el !== null && el.nodeType == 1);
+		return null;
+	    };
+
 	// Hide non-default (Bitbucket & GitLab) settings on page load.
 	let nonDefault = ['bitbucket', 'gitlab', 'gitea', 'zipfile', 'gist'];