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

ElectronNET.API/Entities/OpenExternalOptions.cs

@@ -0,0 +1,13 @@
+using System.ComponentModel;
+
+namespace ElectronNET.API.Entities
+{
+    public class OpenExternalOptions
+    {
+        /// <summary>
+        /// true to bring the opened application to the foreground. The default is true.
+        /// </summary>
+        [DefaultValue(true)]
+        public bool Activate { get; set; } = true;
+    }
+}