Fixed bug of app title related to badges

Related to #91

app/util/Format.js

@@ -9,6 +9,6 @@ Ext.define('Rambox.util.Format', {
 	}
 
 	,stripNumber: function(n) {
-		return (typeof n == "number") ? n : parseInt(n.match(/\d+/g).join(""));
+		return (typeof n == "number") ? n : n.match(/\d+/g) ? parseInt(n.match(/\d+/g).join("")) : 0;
 	}
 });

electron/main.js

@@ -163,7 +163,7 @@ function createWindow () {
 }
 
 function updateBadge(title) {
-	const messageCount = (/\(([0-9]+)\)/).exec(title);
+	var messageCount = title.match(/\d+/g) ? parseInt(title.match(/\d+/g).join("")) : 0;
 
 	if (process.platform === 'win32') {
 		tray.setBadge(messageCount);