made window properly hidden on auto-startup

index.js

@@ -6,6 +6,11 @@ var url = require('url');
 
 require('./crash-reporter');
 
+// Start the app without showing the main window when auto launching on login
+// (On Windows and Linux, we get a flag. On MacOS, we get special API.)
+var hidden = process.argv.includes('--hidden') ||
+  (process.platform === 'darwin' && app.getLoginItemSettings().wasOpenedAsHidden);
+
 // Keep a global reference of the window object, if you don't, the window will
 // be closed automatically when the JavaScript object is garbage collected.
 var win;
@@ -15,6 +20,7 @@ function createWindow () {
   win = new BrowserWindow({
     title: 'Electron Demo',
     icon:  path.join(__dirname, 'images', 'daplie-logo.png'),
+    show: !hidden,
     width:  800,
     height: 600,
     minWidth:  280,