Replace ResultItem usercontrol with listbox to improve ui performance

Wox/ImagePathConverter.cs

@@ -0,0 +1,53 @@
+using System;
+using System.Drawing;
+using System.Globalization;
+using System.IO;
+using System.Windows;
+using System.Windows.Data;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+
+namespace Wox
+{
+    public class ImagePathConverter : IMultiValueConverter
+    {
+        private static ImageSource GetIcon(string fileName)
+        {
+            Icon icon = Icon.ExtractAssociatedIcon(fileName);
+            return System.Windows.Interop.Imaging.CreateBitmapSourceFromHIcon(
+                icon.Handle,
+                new Int32Rect(0, 0, icon.Width, icon.Height),
+                BitmapSizeOptions.FromEmptyOptions());
+        }
+
+        public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
+        {
+            string path = values[0].ToString();
+            string pluginDirectory = values[1].ToString();
+
+            string resolvedPath = string.Empty;
+            if (!string.IsNullOrEmpty(path) && path.Contains(":\\") && File.Exists(path))
+            {
+                resolvedPath = path;
+            }
+            else if (!string.IsNullOrEmpty(path) && File.Exists(pluginDirectory + path))
+            {
+                resolvedPath = pluginDirectory + path;
+            }
+
+            if (resolvedPath.ToLower().EndsWith(".exe") || resolvedPath.ToLower().EndsWith(".lnk"))
+            {
+                return GetIcon(resolvedPath);
+            }
+            else
+            {
+                return new BitmapImage(new Uri(resolvedPath));
+            }
+        }
+
+        public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
+        {
+            return null;
+        }
+    }
+}