NotifyWPF

---------
CHG   Lot of plumbing, some fixes
CHG   Work on sample project.
CHG   Popups and ContextMenu now store coordinates - otherwise delayed opending may happen elsewhere.

git-svn-id: https://svn.evolvesoftware.ch/repos/evolve.net/WPF/NotifyIcon@55 9f600761-6f11-4665-b6dc-0185e9171623

Source/Sample Project/Commands/TaskbarIconCommands.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Windows.Input;
+
+namespace Sample_Project.Commands
+{
+  public static class TaskbarIconCommands
+  {
+    public static HideMainWindowCommand HideMain { get; set; }
+    public static ShowMainWindowCommand ShowMain { get; set; }
+
+
+    static TaskbarIconCommands()
+    {
+      HideMain = new HideMainWindowCommand();
+      ShowMain  =new ShowMainWindowCommand();
+    }
+
+    public static void RefreshCommands()
+    {
+      HideMain.RaiseCanExcecuteChanged();
+      ShowMain.RaiseCanExcecuteChanged();
+    }
+  }
+}