webapp: Improve javascript's handling of longpolling connection failures, by reloading the current page in this case. Works around chromium behavior where ajax connections to urls that were already accessed are denied after navigating back to a previous page.

templates/notifications/longpolling.julius

@@ -3,7 +3,7 @@ $(function() {
 		var f = function() {
 			longpoll(url, #{ident}
 				, function() { setTimeout(f, #{delay}); }
-				, function() { webapp_disconnected(); }
+				, function() { window.location.reload(true); }
 			);	
 		};
 		setTimeout(f, #{startdelay});