Dummy Node Remove Color Overlays (#12743)

* Dummy Node Remove Color Overlays

Removed some of the styling elements fighting visually with the Dummy Node. This node is used for Unresolved or Deprecated nodes and does not require any visual candy to function.

* Dummy Node Recover Frozen State

- reverted change where frozen overlay in zoomed-in state will be removed

src/Libraries/CoreNodeModelsWpf/NodeViewCustomizations/DummyNode.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Media;
 using System.Windows.Media.Imaging;
@@ -24,12 +25,19 @@ public void CustomizeView(DummyNode model, Dynamo.Controls.NodeView nodeView)
                 Width = 66.0,
                 Height = 66.0,
                 Stretch = Stretch.UniformToFill,
+                HorizontalAlignment = HorizontalAlignment.Center,
+                VerticalAlignment = VerticalAlignment.Center,
                 Source = new BitmapImage(new Uri(src, UriKind.Relative))
             };
             RenderOptions.SetBitmapScalingMode(dummyNodeImage, BitmapScalingMode.HighQuality);
 
             nodeView.inputGrid.Children.Add(dummyNodeImage);
             model.Warning(model.GetDescription(), true);
+
+            // Grid containing the State overlay Glyphs in Zoomed Out state
+            // Remove so only the 'paperclip' icon appears 
+            UIElement child = nodeView.grid.FindName("zoomGlyphsGrid") as UIElement;    
+            if (child != null) nodeView.grid.Children.Remove(child);
         }
 
         public void Dispose()