add documentation to GridViewColumnAutoSize and correct position of tooltip for partly visible cells in TaskView

src/Main/Base/Project/Src/Gui/Pads/TaskList/TaskViewResources.xaml.cs

@@ -27,7 +27,13 @@ namespace ICSharpCode.SharpDevelop.Gui
 			var args = new object[] { 0, 0, 0, 0, 0 };
 			GetLineDetails.Invoke(target, args);
 			if ((int)args[4] > 0) {
-				target.ToolTip = new ToolTip { Content = new TextBlock { Text = target.Text, TextWrapping = TextWrapping.Wrap }, PlacementTarget = target, Placement = PlacementMode.Relative };
+				target.ToolTip = new ToolTip {
+					Content = new TextBlock { Text = target.Text, TextWrapping = TextWrapping.Wrap },
+					PlacementTarget = target,
+					Placement = PlacementMode.Relative,
+					VerticalOffset = -2,
+					HorizontalOffset = -6
+				};
 			} else {
 				target.ToolTip = null;
 			}

src/Main/ICSharpCode.Core.Presentation/GridViewColumnAutoSize.cs

@@ -9,6 +9,14 @@ using System.Windows.Controls;
 
 namespace ICSharpCode.Core.Presentation
 {
+	/// <summary>
+	/// This class adds the AutoWidth property to the WPF ListView.
+	/// It supports a semi-colon-separated list of values, for each defined cell.
+	/// Each value can either be a fixed size double, or a percentage.
+	/// The sizes of columns with a percentage will be calculated from the
+	/// remaining width (after assigning the fixed sizes).
+	/// Examples: 50%;25%;25% or 30;100%;50
+	/// </summary>
 	public class GridViewColumnAutoSize
 	{
 		public static readonly DependencyProperty AutoWidthProperty =