Fix more menu issues

- Restore ViewControls3D Overflow menu selection
- Revise DropList styling
- Revert to prior mechanism for DynamicPopupContent
- Create redirector in PrinterTabPage for dynamic overflow menu

PartPreviewWindow/OverflowDropdown.cs

@@ -36,7 +36,6 @@ using MatterHackers.Agg.PlatformAbstract;
 using MatterHackers.Agg.Image;
 using MatterHackers.Agg.ImageProcessing;
 using System;
-using System.Collections.Generic;
 
 namespace MatterHackers.MatterControl.PartPreviewWindow
 {
@@ -67,7 +66,7 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 
 		public GuiWidget PopupContent { get; set; }
 
-		public List<Func<GuiWidget>> DynamicPopupContent { get; set; } = new List<Func<GuiWidget>>();
+		public Func<GuiWidget> DynamicPopupContent { get; set; }
 
 		public bool AlignToRightEdge { get; set; }
 
@@ -94,18 +93,9 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 
 			this.PopupContent?.ClearRemovedFlag();
 
-			// Invoke registered funcs until content is found
 			if (this.DynamicPopupContent != null)
 			{
-				foreach(var action in this.DynamicPopupContent)
-				{
-					var content = action();
-					if(content != null)
-					{
-						this.PopupContent = content;
-						break;
-					}
-				}
+				this.PopupContent = this.DynamicPopupContent();
 			}
 
 			if (this.PopupContent == null)

PartPreviewWindow/PartPreviewContent.cs

@@ -132,6 +132,15 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 				{
 					modelViewer.meshViewerWidget.ResetView();
 				};
+				viewControls3D.OverflowButton.DynamicPopupContent = () =>
+				{
+					if (modelViewer.Visible)
+					{
+						return modelViewer.ShowOverflowMenu();
+					}
+
+					return null;
+				};
 
 				// The 3D model view
 				modelViewer = new View3DWidget(printItem,

PartPreviewWindow/View3D/PrinterActionsBar.cs

@@ -85,12 +85,12 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 				{
 					AlignToRightEdge = true,
 				};
-				overflowDropdown.DynamicPopupContent.Add(GeneratePopupContent);
+				overflowDropdown.DynamicPopupContent = GeneratePopupContent;
 
 				// Deregister on close
 				this.Closed += (s, e) =>
 				{
-					overflowDropdown.DynamicPopupContent.Add(GeneratePopupContent);
+					overflowDropdown.DynamicPopupContent = GeneratePopupContent;
 				};
 
 				this.AddChild(overflowDropdown);

PartPreviewWindow/View3D/View3DWidget.cs

@@ -64,7 +64,7 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 		private IObject3D item;
 		private View3DWidget view3DWidget;
 
-		public string Name { get { return "General"; } }
+		public string Name => "General";
 
 		public bool Unlocked => true;
 
@@ -2396,7 +2396,7 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 
 
 		// ViewControls3D {{
-		private GuiWidget ShowOverflowMenu()
+		internal GuiWidget ShowOverflowMenu()
 		{
 			var popupContainer = new FlowLayoutWidget(FlowDirection.TopToBottom);
 

PartPreviewWindow/ViewControls3D.cs

@@ -69,7 +69,7 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 
 		private EventHandler unregisterEvents;
 
-		private OverflowDropdown overflowButton;
+		internal OverflowDropdown OverflowButton;
 
 		public event EventHandler ResetView;
 
@@ -176,10 +176,10 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 			};
 			AddChild(layersButton);
 
-			overflowButton = new OverflowDropdown(allowLightnessInvert: false);
-			overflowButton.ToolTipText = "More...".Localize();
-			overflowButton.Margin = 3;
-			AddChild(overflowButton);
+			OverflowButton = new OverflowDropdown(allowLightnessInvert: false);
+			OverflowButton.ToolTipText = "More...".Localize();
+			OverflowButton.Margin = 3;
+			AddChild(OverflowButton);
 
 			HAnchor |= Agg.UI.HAnchor.ParentLeft;
 			VAnchor = Agg.UI.VAnchor.ParentTop;

SlicerConfiguration/SettingsControlSelectors.cs

@@ -284,7 +284,7 @@ namespace MatterHackers.MatterControl.SlicerConfiguration
 			var dropDownList = new DropDownList(defaultMenuItemText, maxHeight: 300, useLeftIcons: true)
 			{
 				HAnchor = HAnchor.ParentLeftRight,
-				MenuItemsPadding = new BorderDouble(10, 4, 10, 6),
+				MenuItemsPadding = new BorderDouble(10, 7, 7, 7),
 			};
 
 			dropDownList.Name = layerType.ToString();