DYN-4304-ContextMenu-Direction (#13624)

When showing the NotificationsCenter popup and the Windows10 Handedness is Right-handed then the popup was shown in the wrong location then I implemented a fix that will be setting temporally the field _menuDropAlignment (this one modifies the Handedness) so in this way if the Handedness is Right-handed we will be setting this to Left-handed and the popup will be displayed in the right direction.

src/Notifications/View/NotificationUI.xaml.cs

@@ -1,4 +1,5 @@
-using System.Windows;
+using System.Reflection;
+using System.Windows;
 using System.Windows.Controls.Primitives;
 
 namespace Dynamo.Notifications.View
@@ -19,6 +20,15 @@ public NotificationUI()
                 notificationsUIViewModel = new NotificationsUIViewModel();
             }
 
+            //When if the Windows Handedness parameter is set to Right-handed (True) then we need to set the _menuDropAlignment field to false otherwise the Notifications popup will be shown in a wrong Position
+            var ifLeft = SystemParameters.MenuDropAlignment;
+            if (ifLeft) //If MenuDropAlignment = Right-handed(True)
+            {
+                var t = typeof(SystemParameters);
+                var field = t.GetField("_menuDropAlignment", BindingFlags.NonPublic | BindingFlags.Static);
+                field.SetValue(null, false); //Set the field to Left-handed(false)
+            }
+
             DataContext = notificationsUIViewModel;
 
             //The BackgroundRectangle represent the tooltip background rectangle that is drawn over a Canvas