add App.Ready event

ElectronNET.API/App.cs

@@ -353,10 +353,28 @@ namespace ElectronNET.API
 
         private event Action<bool> _accessibilitySupportChanged;
 
+        /// <summary>
+        /// Emitted when the application has finished basic startup.
+        /// </summary>
+        public event Action Ready;
+
         /// <summary>
         /// Application host fully started.
         /// </summary>
-        public bool IsReady { get; internal set; }
+        public bool IsReady 
+        { 
+            get { return _isReady; }
+            internal set
+            {
+                _isReady = value;
+
+                if(value)
+                {
+                    Ready?.Invoke();
+                }
+            }
+        }
+        private bool _isReady = false;
 
         /// <summary>
         /// A property that indicates the current application's name, which is the

ElectronNET.WebApp/Controllers/MenusController.cs

@@ -11,9 +11,13 @@ namespace ElectronNET.WebApp.Controllers
         {
             if (HybridSupport.IsElectronActive)
             {
-                if (Electron.App.IsReady)
+                if(Electron.App.IsReady)
                 {
                     CreateContextMenu();
+                } 
+                else
+                {
+                    Electron.App.Ready += () => CreateContextMenu();
                 }
 
                 var menu = new MenuItem[] {