implement Demo App sections: Dialogs, Menu, Tray, Shell, CrashHang, Notification, Shortcuts etc. Fix some API bugs and implement GlobalShortcut-, Shell- and WebContents-API.

ElectronNET.WebApp/Controllers/TrayController.cs

@@ -0,0 +1,34 @@
+using Microsoft.AspNetCore.Mvc;
+using ElectronNET.API;
+using ElectronNET.API.Entities;
+
+namespace ElectronNET.WebApp.Controllers
+{
+    public class TrayController : Controller
+    {
+        public IActionResult Index()
+        {
+            Electron.IpcMain.On("put-in-tray", (args) => {
+
+                if (Electron.Tray.Items.Count == 0)
+                {
+                    var menu = new MenuItem
+                    {
+                        Label = "Remove",
+                        Click = () => Electron.Tray.Destroy()
+                    };
+
+                    Electron.Tray.Show("/Assets/electron_32x32.png", menu);
+                    Electron.Tray.SetToolTip("Electron Demo in the tray.");
+                }
+                else
+                {
+                    Electron.Tray.Destroy();
+                }
+
+            });
+
+            return View();
+        }
+    }
+}