Add clipboard plugin.

Wox/ResultPanel.xaml.cs

@@ -3,6 +3,7 @@ using System.Collections.Generic;
 using System.Diagnostics;
 using System.Windows;
 using System.Windows.Controls;
+using System.Windows.Media;
 using Wox.Helper;
 using Wox.Infrastructure;
 using Wox.Plugin;
@@ -58,6 +59,29 @@ namespace Wox
             return location;
         }
 
+        private FrameworkElement FindByName(string name, FrameworkElement root)
+        {
+            Stack<FrameworkElement> tree = new Stack<FrameworkElement>();
+            tree.Push(root);
+
+            while (tree.Count > 0)
+            {
+                FrameworkElement current = tree.Pop();
+                if (current.Name == name)
+                    return current;
+
+                int count = VisualTreeHelper.GetChildrenCount(current);
+                for (int i = 0; i < count; ++i)
+                {
+                    DependencyObject child = VisualTreeHelper.GetChild(current, i);
+                    if (child is FrameworkElement)
+                        tree.Push((FrameworkElement)child);
+                }
+            }
+
+            return null;
+        }
+
         public void SelectNext()
         {
             int index = lbResults.SelectedIndex;