center numbers

MatterControlLib/PartPreviewWindow/MainViewWidget.cs

@@ -488,7 +488,9 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 			if (!string.IsNullOrEmpty(filePath)
 				&& File.Exists(filePath))
 			{
-                if (Path.GetExtension(filePath).ToLower() == ".mcx")
+				switch (Path.GetExtension(filePath).ToLower())
+				{
+					case ".mcx":
 						{
 							if (ApplicationController.Instance.SwitchToWorkspaceIfAlreadyOpen(filePath))
 							{
@@ -506,11 +508,15 @@ namespace MatterHackers.MatterControl.PartPreviewWindow
 
 							ApplicationController.Instance.OpenWorkspace(workspace, WorkspacesChangedEventArgs.OperationType.Add);
 						}
-                else
+						break;
+
+					default:
 						{
 							var workspace = await CreateNewDesignTab(false);
 							workspace.SceneContext.AddToPlate(new string[] { filePath }, false);
 						}
+						break;
+				}
             }
 		}
 

MatterControlLib/PartPreviewWindow/View3D/Actions/SheetEditor.cs

@@ -110,6 +110,7 @@ namespace MatterHackers.MatterControl.DesignTools
 				numCell.AddChild(new TextWidget((y + 1).ToString())
 				{
 					TextColor = theme.TextColor,
+                    HAnchor = HAnchor.Center,
                     VAnchor = VAnchor.Center,
 				});