Quit app when all window closed

lib/main-app.js

@@ -69,6 +69,10 @@ ipc.on('update-app-confirm', function (event, msg) {
   }
 })
 
+app.on('window-all-closed', function () {
+  app.quit()
+})
+
 app.on('ready', function () {
   mainWindow = require('./main-window')