Fix WatchPad issues;

FontFamily & FontSize in ChangeMarkerMargin tooltip are from CodeEditorOptions

src/AddIns/Debugger/Debugger.AddIn/Pads/Commands/WatchPadCommands.cs

@@ -45,7 +45,7 @@ namespace Debugger.AddIn
 					
 					TextNode text = new TextNode(input,
 					                             language == "VB" || language == "VBNet" ? SupportedLanguage.VBNet : SupportedLanguage.CSharp);
-					var list = (WatchList)pad.Control;
+					var list = pad.WatchList;
 					
 					if(!list.WatchItems.ContainsItem(text))
 						list.WatchItems.Add(text);
@@ -62,15 +62,13 @@ namespace Debugger.AddIn
 		{
 			if (this.Owner is WatchPad) {
 				WatchPad pad = (WatchPad)this.Owner;
-				var list = (WatchList)pad.Control;
+				var list = pad.WatchList;
-				
 				var node = list.SelectedNode;
 				
 				if (node == null)
 					return;
 				
 				list.WatchItems.Remove(node);
-				
 				((WatchPad)this.Owner).RefreshPad();
 			}
 		}
@@ -92,7 +90,7 @@ namespace Debugger.AddIn
 		{
 			if (this.Owner is WatchPad) {
 				WatchPad pad = (WatchPad)this.Owner;
-				var list = (WatchList)pad.Control;
+				var list =  pad.WatchList;
 				list.WatchItems.Clear();
 			}
 		}
@@ -104,7 +102,7 @@ namespace Debugger.AddIn
 		{
 			if (this.Owner is WatchPad) {
 				WatchPad pad = (WatchPad)this.Owner;
-				var list = (WatchList)pad.Control;
+				var list =  pad.WatchList;
 				if (list.SelectedNode is ExpressionNode) {
 					string text = ((ExpressionNode)list.SelectedNode).FullText;
 					ClipboardWrapper.SetText(text);

src/AddIns/Debugger/Debugger.AddIn/Pads/WatchPad.cs

@@ -31,6 +31,12 @@ namespace ICSharpCode.SharpDevelop.Gui.Pads
 			get { return instance; }
 		}
 		
+		public WatchList WatchList {
+			get {
+				return watchList;
+			}
+		}
+		
 		public WatchPad()
 		{
 			instance = this;

src/AddIns/DisplayBindings/AvalonEdit.AddIn/Src/ChangeMarkerMargin.cs

@@ -8,6 +8,7 @@ using System.Windows.Controls;
 using System.Windows.Input;
 using System.Windows.Media;
 
+using ICSharpCode.AvalonEdit.AddIn.Options;
 using ICSharpCode.AvalonEdit.Editing;
 using ICSharpCode.AvalonEdit.Rendering;
 
@@ -145,7 +146,8 @@ namespace ICSharpCode.AvalonEdit.AddIn
 					Background = Brushes.White
 				};
 				TextBlock oldTb = new TextBlock() {
-					FontFamily = new FontFamily("Courier New"),
+					FontFamily = new FontFamily(CodeEditorOptions.Instance.FontFamily),
+					FontSize = CodeEditorOptions.Instance.FontSize,
 					Foreground = Brushes.Black,
 					Background = Brushes.White,
 					TextDecorations = TextDecorations.Strikethrough,
@@ -155,7 +157,8 @@ namespace ICSharpCode.AvalonEdit.AddIn
 					oldTb.Text = diffs[0].Text.Trim();
 				
 				TextBlock newTb = new TextBlock() {
-					FontFamily = new FontFamily("Courier New"),
+					FontFamily = new FontFamily(CodeEditorOptions.Instance.FontFamily),
+					FontSize = CodeEditorOptions.Instance.FontSize,
 					Foreground = Brushes.Black,
 					Background = Brushes.White,
 					Text = diffs[1].Text.Trim()