Fix menu on non-darwin

main.js

@@ -164,9 +164,11 @@ app.on('ready', function() {
   createWindow();
 
   let template = require('./menu.js');
+  if (process.platform === 'darwin') {
     template[3].submenu[3].click = function() {
       mainWindow.show();
     };
+  }
   const menu = Menu.buildFromTemplate(template);
   Menu.setApplicationMenu(menu);