修正TrayRobot、LL、PM、TM仅有Tray时，Tray无法拖放的问题。

SicUI/Controls/WaferCtrl.xaml

@@ -35,7 +35,7 @@
             ToolTip="{Binding ToolTip}"
             ToolTipService.ShowOnDisabled="True"
             TrayProcessCount="{Binding TrayProcessCount}"
-            TrayStatus="{Binding TrayState}"
+            TrayStatus="{Binding WaferTrayStatus}"
             ViewType="Top"
             WaferStatus="{Binding WaferStatus}">
             <ctrl:Slot.RenderTransform>