Prevent Unsupported browser in Discord

Fixes #1177

app/store/ServicesList.js

@@ -188,6 +188,7 @@ Ext.define('Rambox.store.ServicesList', {
 			,titleBlink: true
 			,js_unread: 'function checkUnread(){var a=document.getElementsByClassName("guild unread").length,b=0,c=document.getElementsByClassName("badge");for(i=0;i<c.length;i++)b+=parseInt(c[i].innerHTML.trim());updateBadge(a,b)}function updateBadge(a,b){var c=b>0?"("+b+") ":a>0?"(•) ":"";document.title=c+originalTitle}var originalTitle=document.title;setInterval(checkUnread,3e3);'
 			,note: 'To enable desktop notifications, you have to go to Options inside Discord.'
+			,userAgent: 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.100 Safari/537.36'
 		},
 		{
 			 id: 'outlook'