fix #360: Current line highlighting always seen in preview of Highlighting Editor

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

@@ -86,6 +86,7 @@ namespace Debugger.AddIn.Pads.Controls
 			this.editor.ClearValue(TextEditor.FontFamilyProperty);
 			this.editor.ClearValue(TextEditor.FontSizeProperty);
 			this.editor.ShowLineNumbers = false;
+			this.editor.Options.HighlightCurrentLine = false;
 			this.editor.WordWrap = false;
 			this.editor.HorizontalScrollBarVisibility = ScrollBarVisibility.Hidden;
 			this.editor.VerticalScrollBarVisibility = ScrollBarVisibility.Hidden;

src/AddIns/DisplayBindings/AvalonEdit.AddIn/Src/Options/HighlightingOptions.xaml.cs

@@ -596,6 +596,7 @@ namespace ICSharpCode.AvalonEdit.AddIn.Options
 					}
 					textEditor.Select(0, 0);
 					bracketHighlighter.SetHighlight(null);
+					textEditor.Options.HighlightCurrentLine = false;
 					item.ShowExample(textEditor.TextArea);
 					ITextMarker m = textMarkerService.TextMarkers.SingleOrDefault();
 					if (m != null && m.Tag != null) {