Putting a menu to switch view settings.

Made the trace data build faster.
Made ungroup understand mesh collections better
Made the slice settings layer index be an enum so it is clearer what is being accessed
Put menu items into separate files

ApplicationView/MenuRow/MenuOptionHelpView.cs

@@ -0,0 +1,90 @@
+using System;
+using System.IO;
+using MatterHackers.Agg;
+using MatterHackers.Agg.UI;
+using MatterHackers.Localizations;
+using MatterHackers.MatterControl.CustomWidgets;
+using MatterHackers.MatterControl.DataStorage;
+using MatterHackers.MatterControl.ContactForm;
+using MatterHackers.MatterControl.PrinterCommunication;
+using MatterHackers.MatterControl.PrinterControls.PrinterConnections;
+using MatterHackers.MatterControl.PrintQueue;
+using MatterHackers.VectorMath;
+
+namespace MatterHackers.MatterControl
+{
+    public class MenuOptionView : GuiWidget
+    {
+        public DropDownMenu MenuDropList;
+        private TupleList<string, Func<bool>> menuItems;
+
+        public MenuOptionView()
+        {
+            MenuDropList = new DropDownMenu("View".Localize().ToUpper(), Direction.Down, pointSize: 10);
+            MenuDropList.MenuItemsPadding = new BorderDouble(0);
+            MenuDropList.Margin = new BorderDouble(0);
+            MenuDropList.Padding = new BorderDouble(0);
+
+            SetMenuItems();
+
+            AddChild(MenuDropList);
+            this.Width = 48 * TextWidget.GlobalPointSizeScaleRatio;
+            this.Height = 22 * TextWidget.GlobalPointSizeScaleRatio;
+            this.Margin = new BorderDouble(0);
+            this.Padding = new BorderDouble(0);
+            this.VAnchor = Agg.UI.VAnchor.ParentCenter;
+            this.MenuDropList.SelectionChanged += new EventHandler(MenuDropList_SelectionChanged);
+            this.MenuDropList.OpenOffset = new Vector2(0, 0);
+        }
+
+        void MenuDropList_SelectionChanged(object sender, EventArgs e)
+        {
+            string menuSelection = ((DropDownMenu)sender).SelectedValue;
+            foreach (Tuple<string, Func<bool>> item in menuItems)
+            {
+                if (item.Item1 == menuSelection)
+                {
+                    if (item.Item2 != null)
+                    {
+                        item.Item2();
+                    }
+                }
+            }
+        }
+
+        void SetMenuItems()
+        {
+            menuItems = new TupleList<string, Func<bool>> 
+            {                
+                {LocalizedString.Get("Simple"), simple_Click},
+                {LocalizedString.Get("Intermediat"), intermediate_Click},
+                {LocalizedString.Get("Advanced"), advanced_Click},
+            };
+
+            BorderDouble padding = MenuDropList.MenuItemsPadding;
+            //Add the menu items to the menu itself
+            foreach (Tuple<string, Func<bool>> item in menuItems)
+            {
+                MenuDropList.MenuItemsPadding = new BorderDouble(8, 4, 8, 4) * TextWidget.GlobalPointSizeScaleRatio;
+                MenuDropList.AddItem(item.Item1, pointSize: 10);
+            }
+            MenuDropList.Padding = padding;
+        }
+
+
+        bool advanced_Click()
+        {
+            return true;
+        }
+
+        bool intermediate_Click()
+        {
+            return true;
+        }
+
+        bool simple_Click()
+        {
+            return true;
+        }
+    }
+}