Chart Refactor (#1019)

* Rename variable 'traffic' to 'trafficPerSecondQueue' and 'trafficInfoQueue'

* Remove class QueueLast<T> by using linq Queue.Last()

* Slight changes, such as rename, move several variables from function domain to class domain to improve performance.
Logic remains the same.

* Update the logic of copying queue from Controller to View.

* Move the TrafficInfo declaration into LogForm class

Overwise, the VS UI designer does not work.

shadowsocks-csharp/View/MenuViewController.cs

@@ -13,6 +13,7 @@ using Shadowsocks.Controller;
 using Shadowsocks.Model;
 using Shadowsocks.Properties;
 using Shadowsocks.Util;
+using System.Linq;
 
 namespace Shadowsocks.View
 {
@@ -112,8 +113,8 @@ namespace Shadowsocks.View
 
             Icon newIcon;
 
-            bool hasInbound = controller.traffic.Last.inboundIncreasement > 0;
-            bool hasOutbound = controller.traffic.Last.outboundIncreasement > 0;
+            bool hasInbound = controller.trafficPerSecondQueue.Last().inboundIncreasement > 0;
+            bool hasOutbound = controller.trafficPerSecondQueue.Last().outboundIncreasement > 0;
 
             if (hasInbound && hasOutbound)
                 newIcon = icon_both;