Fix Keyboard shortcuts for switching apps do not focus the app

fixes #2461

app/view/main/MainController.js

@@ -42,10 +42,13 @@ Ext.define('Rambox.view.main.MainController', {
 		}
 
 		var webview = newTab.down('component').el.dom;
+
+		setTimeout(function () {
 			if ( webview ) {
 				tabPanel.getActiveTab().getWebView().blur();
 				tabPanel.getActiveTab().getWebView().focus();
 			}
+		}, 300);
 
 		// Update the main window so it includes the active tab title.
 		if ( Rambox.app.getTotalNotifications() > 0 ) {