implement all BrowserWindow API Events and the rest of missed functions

ElectronNET.API/Extensions/ThumbarButtonExtensions.cs

@@ -0,0 +1,39 @@
+using ElectronNET.API.Entities;
+using System;
+using System.Collections.Generic;
+
+namespace ElectronNET.API.Extensions
+{
+    internal static class ThumbarButtonExtensions
+    {
+        public static ThumbarButton[] AddThumbarButtonsId(this ThumbarButton[] thumbarButtons)
+        {
+            for (int index = 0; index < thumbarButtons.Length; index++)
+            {
+                var thumbarButton = thumbarButtons[index];
+
+                if (string.IsNullOrEmpty(thumbarButton.Id))
+                {
+                    thumbarButton.Id = Guid.NewGuid().ToString();
+                }
+            }
+
+            return thumbarButtons;
+        }
+
+        public static ThumbarButton GetThumbarButton(this List<ThumbarButton> thumbarButtons, string id)
+        {
+            ThumbarButton result = new ThumbarButton("");
+
+            foreach (var item in thumbarButtons)
+            {
+                if (item.Id == id)
+                {
+                    result = item;
+                }
+            }
+
+            return result;
+        }
+    }
+}