Hook escape key to clear search filter

MatterControlLib/Library/Widgets/SearchableTreePanel.cs

@@ -83,6 +83,15 @@ namespace MatterHackers.MatterControl.PrintLibrary
 				this.ClearSearch();
 			};
 
+			searchBox.KeyDown += (s, e) =>
+			{
+				if (e.KeyCode == Keys.Escape)
+				{
+					this.ClearSearch();
+					e.Handled = true;
+				}
+			};
+
 			searchBox.searchInput.ActualTextEditWidget.TextChanged += (s, e) =>
 			{
 				if (string.IsNullOrWhiteSpace(searchBox.Text))
@@ -163,6 +172,8 @@ namespace MatterHackers.MatterControl.PrintLibrary
 			searchBox.Text = "";
 			searchBox.ResetButton.Visible = false;
 			treeView.SelectedNode = null;
+
+			this.OnClearSearch();
 		}
 
 		protected abstract bool FilterTree(TreeNode context, string filter, bool parentVisible, List<TreeNode> matches);
@@ -178,6 +189,10 @@ namespace MatterHackers.MatterControl.PrintLibrary
 			}
 		}
 
+		protected virtual void OnClearSearch()
+		{
+		}
+
 		public bool TreeLoaded { get; protected set; }
 	}
 }

MatterControlLib/SetupWizard/DialogPage.cs

@@ -246,7 +246,8 @@ namespace MatterHackers.MatterControl
 
 		private void SystemWindow_KeyDown(object sender, KeyEventArgs e)
 		{
-			if (e.KeyCode == Keys.Escape)
+			if (e.KeyCode == Keys.Escape
+				&& !e.Handled)
 			{
 				this.OnCancel(out bool abortCancel);
 

MatterControlLib/SetupWizard/HelpPage.cs

@@ -28,6 +28,7 @@ either expressed or implied, of the FreeBSD Project.
 */
 
 using System.Collections.Generic;
+using MatterHackers.Agg;
 using MatterHackers.Agg.UI;
 using MatterHackers.Localizations;
 using MatterHackers.MatterControl.PartPreviewWindow;
@@ -45,6 +46,7 @@ namespace MatterHackers.MatterControl
 			this.headerRow.Visible = false;
 
 			contentRow.Padding = 0;
+			contentRow.BackgroundColor = Color.Transparent;
 
 			contentRow.AddChild(new HelpTreePanel(theme, guideKey)
 			{

MatterControlLib/SetupWizard/HelpTreePanel.cs

@@ -91,6 +91,12 @@ namespace MatterHackers.MatterControl
 			return hasMatch;
 		}
 
+		protected override void OnClearSearch()
+		{
+			rootNode.Expanded = true;
+			base.OnClearSearch();
+		}
+
 		private void CreateKeyBindingsPage()
 		{
 			double left, right;