Fix build system.

assets/js/components/calls/callWindow.js

@@ -694,7 +694,7 @@ ComunicWeb.components.calls.callWindow = {
 			call.signalClient.sendSignal(member.user_call_id, JSON.stringify(data));
 		});
 
-		peer.on("message", message => {
+		peer.on("message", function(message){
 			console.log("Message from remote peer: " + message);
 		});
 
@@ -788,7 +788,7 @@ ComunicWeb.components.calls.callWindow = {
 		/**
 		 * @type {HTMLVideoElement}
 		 */
-		let video = createElem2({
+		var video = createElem2({
 			appendTo: call.window.videosTarget,
 			type: "video"
 		});

assets/js/components/calls/controller.js

@@ -94,7 +94,7 @@ ComunicWeb.components.calls.controller = {
 	 * 
 	 * @return Cached calls configuration
 	 */
-	getConfig() {
+	getConfig: function() {
 		return ComunicWeb.components.calls.__config;
 	},
 

assets/js/components/calls/currentList.js

@@ -42,7 +42,7 @@ ComunicWeb.components.calls.currentList = {
 	 * @param {number} id The ID of the call to add
 	 */
 	addCallToList: function(id){
-		let list = this.getCurrentCallsList();
+		var list = this.getCurrentCallsList();
 
 		if(!list.includes(""+id))
 			list.push(id);
@@ -57,7 +57,7 @@ ComunicWeb.components.calls.currentList = {
 	 */
 	removeCallFromList: function(id){
 
-		let list = this.getCurrentCallsList();
+		var list = this.getCurrentCallsList();
 
 		while(list.includes(""+id))
 			list.splice(list.indexOf(""+id), 1);