Improve instant search ue

Wox.Plugin/Result.cs

@@ -73,6 +73,11 @@ namespace Wox.Plugin
         /// </summary>
         public List<Result> ContextMenu { get; set; }
 
+        /// <summary>
+        /// Additional data associate with this result
+        /// </summary>
+        public object ContextData { get; set; }
+
         /// <summary>
         /// Plugin ID that generate this result
         /// </summary>